Rania tries to get back the custody of her son, but, did she marry the killer of the man of her life? Billy and Makis are determined to punish Aggeliki and Markidis for the Dimitris's death, but do they find themselves guilty? The bank informs Katerina of a seizure decision but she loses it in a grassy place and Antigoni Mayhem arrives to spread confusion and panic. Things are getting darker in the world of s1NgLEs, but is every ending a new beginning?

Rania manages to see Lucas jr. but the meeting does not go as she expected, Katerina tries to find out what was on the bank paper, Giannis tries to convince Rania that he did not organize Lucas' murder, Billy confronts Dimitris's killer, Mayhem makes an invitation and, as things seem to be going from bad to worse, Lila decides to go against the script and leave the world of s1NgLEs for a city where people will not be alone. And as if that wasn't enough, 2½ new characters, a chauvinist marketing manager, an outcast street traveler and a very disobedient dog enter the world of s1NgLEs...

Rania is haunted by insecurities about being a good mother and Fotis from the bank about the seizure. Maybe they can help each other. Lila is pursued by terrible misfortune, as she tries to leave the city with a Lilmobile that shows new problems and Tzaba that does not seem to help. Billy is pursued by Tanya who is determined to torture him as much as necessary to tell the whole truth about Dimitris's death. Lucas jr. is persecuted by Aggelos for what happened to his mother, but it is time to find out what is hidden in his childish mind. And all the heroes board the Mayhem Express for a train trip. But not all passengers will get off at the last station...

Take any two s1NgLEs and lock them in the same wagon. Mayhem shuffles her captives like playing cards hoping that this particular deck of characters will reveal to her not the future, but the past. Rania-Lila, Billy-Tsikalakis, Fotis-Aggeliki Sereti and other mismatched twins locked in the same train compartment are forced to find themselves tête-à-tête and talk. What do they have to say to each other; Caught up in a bizarre game of karmic mystery, the heroes of the series blame each other for saving themselves. And they are forced to ask themselves: when a whole chain of random incidents has led to one death, who is really the killer?

The s1NgLEs trapped on a train locked in a death march. If they don't stop it, one of them will die. The last and most shocking chapter in the Mayhem Express saga finds Rania and Lila on the roof of the train threatened by Tanya, while Fotis, Katerina, Billy and Makis are forced to join forces with Markidis and Aggeliki against the kidnappers. Will s1NgLEs manage to stop the train? Will Katerina and Fotis manage to pay the bank and save their house from foreclosure? Will Mayhem get the revenge she came for? Will she punish her son's murder with murder? This episode comes with answers to all these questions and an even more important one. Because it's time to find out if Giannis is behind Lucas's murder...

With the trial of Lucas's jr. custody injunction approaching headlong, Rania must decide to trust a witness to testify on her behalf in court and unfortunately can't be herself. Fotis and Katerina must decide whether to pursue their dreams for the career they dream of or settle for temporary jobs to overcome their financial difficulties. Giannis decides whether in court he will be on the side of Rania or his mother. Lila meets Elias and decides to postpone her trip for the Great Adventure of life, in order to do a little clubbing in the bars of the city. And Tzaba decides to leave the house, but he will learn that the world is not strewn with rose petals when you move around in a wheelchair. Doomsday begins and, by the end of its first part, some very important secrets will be revealed and one of the characters will leave the world of s1NgLEs...

The hour of judgment continues for s1NgLEs with the relationship of Rania and Lila being tested once again before Justice but also the relationship of Katerina and Fotis being tested before Mrs Chrisoula, Katerina's newly arrived mother from Thessaloniki, who dislikes Fotis at first sight. Will Rania and Lila manage to win the injunction and get Lucas jr. back; Will Fotis and Katerina manage to keep their relationship secret from her mom and get married in time to get the low interest mortgage, even though the Unionists of the municipality are on strike and the mayor has left for the dump?

Fotis and Katerina make repeated attempts to unite the company but no one comes to the dinners they organize, each for his own reasons. But when Lila uses her special gift to find out what the secret will says, it's time for the group to join forces and pursue the impossible: to attempt a second break-in at Aggeliki's house. Determined this time to prepare better, they enroll in a kickboxing school, which of course they will completely upset. And can David defeat Goliath, or does this only happen in the Bible?

The people who after many failures get up and try again are visionaries or idiots; the break-in at Ageliki's house continues with the help of the children only that Fotis, Katerina and Makis are now prisoners in the hands of Markidis. Will Rania, Lila and Billy manage to save them and get their hands on the secret will or do the good guys win only in the movies? And while Aggeliki's company is preparing to close a very important deal with American investors, a rich friend of Antigoni Mayhem comes to Greece trying to seduce Makis with her money, Tzaba dresses as a colonel and Rania and the company join forces for the final showdown with Aggeliki. In all this panic, the company will be able to be reborn from its ashes and turn the game towards it?

What happens when two opposing forces try to move the world in opposite directions?

Rania's confrontation with Aggeliki Sereti culminates now that the two women live together in the same house and Rania's company has invaded the villa sowing panic. Lila sees her one-night stand with the Sereti family's lawyer getting bigger, Rania, in order to regain custody, must decide whether to deny that Lucas was the father of her child, and Oresteis returns from China with evidence that reveals the whole truth about the ships of Sereti's company. Together with Lila, Billy and Makis, they rediscover the end of the thread of Lucas's murder and follow her to the outside to discover his killer...

In the final episode of s1NgLEs 2½ and just before they become s1NgLES 3, the company swirls back into the cyclone of the Big Plan and no one knows where the end of this cycle will find him. Have Fotis and Katerina found their other half or must they continue searching? Will Lucas gr. and Aggelos manage to make ends meet in a world full of dangers? Can Billy and Makis go as far as the murder to take revenge for Dimitris? Will Lila and Orestis manage to learn the whole truth about Lucas's death? Will Aggeliki be punished for everything she has done or do the good guys win only in the movies? The only sure thing is that as in every last episode we will be concerned with a marriage, a flight and a death. And Rania finds out who her real other half is...