A year has passed since we last saw Prime Minister Birgitte Nyborg. In the season opener, Birgitte is visiting soldiers stationed in Afghanistan when their encampment is attacked, and several soldiers are killed. Now she must choose: send the troops home or stage a counterattack?

Prime Minister Birgitte Nyborg must appoint a new EU Commissioner. Sejro would seem the obvious choice, but Birgitte is surprised when he not only turns down the post but sees it as a personal slight. Who can she appoint?

The coalition government is preparing to introduce a new reform package - "A Common Future". But attempts to get agreement on the reforms causes Labour leader Bjørn Marrot serious problems - in the media and within his own party.

Birgitte Nyborg is about to negotiate the environmental element of the new reform package, but she must face the reality of parties unwilling to compromise. Kasper convinces her that underhanded tactics can help win her a majority for the reform. Meanwhile, Katrine receives an unusual job offer that tests her personal beliefs. And at home, Birgitte's children are clearly affected by their mother's stress; Laura in particular.

Kasper's past returns to haunt him as he clears out his parents former home, whilst the Freedom Party suggest lowering the age of criminal responsibility to 12. A move that reveals fundamental differences in the coalition parties.

Birgitte's government is losing steam -- internal differences are growing and only compromise legislation is being passed. Just as opinion polls indicate Birgitte may lose the next election, financier Joachim Crohne emerges with an idea that could save her political career. But can his motives be trusted? Meanwhile, Kasper and Katrine are growing close again, but their jobs are at odds: Katrine's role is to uncover secrets, while Kasper's is to conceal them.

The eyes of the world are on Copenhagen and Birgitte Nyborg as peace talks draw near between North and South Kharun. Everyone has been working around the clock, and although Kasper is now living with Katrine, they rarely see each other. When Birgitte realizes Denmark is only a small piece in a major international power game, her negotiation skills are put to the test. Can she end the bloody civil war?

Laura's illness has worsened over the past few months, and Birgitte now feels terrible about failing to recognize it. When Laura's psychiatrist suggests admitting her to a private psychiatric hospital, Birgitte and Phillip immediately agree. This move becomes problematic when Birgitte's own tax reforms force her to pay out of pocket for the hospital cost. At home, Birgitte and Phillip are rediscovering some of their lost love, despite Philip's continued relationship with Cecilie.

In the season finale, Birgitte is on a month leave from her post as prime minister to focus on family, and Hans-Christian Thorsen, Labor Party chairman, has positioned himself to be her possible successor. Birgitte is torn about whether or not she will return to work. Meanwhile, as Kasper and Katrine hunt for apartments together, their plan is derailed by an argument about the possibility of having children. Will one of them relent?