Just as siblings Esther and Paul Vanhove recruit a group of young people to test their revolutionary soul mate implant, investors drop a bombshell.

While the testers venture out into the world to meet their soul mates, Paul agonizes over Joséphine, and Esther takes a drastic step to help her mom.

After stumbling on a clue to Joséphine’s fate, Esther worries there’s a mole at the company. Billie asks Niels to take a break from seeing Claire.

Paul learns the truth about Joséphine’s disappearance, Niels seeks help at a residential clinic, and the testers’ hallucinations take a dark turn.

To activate her mother’s memory, Esther returns to their old home and uncovers a shocking family secret. Niels receives an unexpected visitor.

As both Esther and Lucas struggle to come to terms with their new realities, Billie helps Ana through a crisis, and Martin begins to act erratically.

With the testers’ lives hanging in the balance, Esther goes to extremes to revive Martin. Meanwhile, Paul and the company prepare for launch day.