Tensions run high at Switzerland's Federal Palace as the new president struggles to save a Swiss diplomat held hostage in Yemen. Meanwhile, a call from a notorious criminal changes the course of cleaning lady Tina's career-and life.

Tina's situation goes from bad to worse after she's discovered by federal officer, Rainald, and faces another impossible decision. Questions about President Kathy Kunz's relationships arise as the hostage crisis intensifies.

A disgraced Rainald attempts to continue his investigation under cover-and begins to suspect Kathy's involvement. A hostage hopes to come home, but a sinister plot threatens to ruin it all and bring chaos to Switzerland.

Reinstated to his post, Rainald is determined to finish his investigation-and is connected with a powerful ally: Kathy's advisor, Elsa. An emboldened Tina begins taking more risks, with potentially serious consequences for her family.

Kathy works to destroy incriminating evidence. Tina embarks on a frantic search for the weapons that will free her daughter-and may be compromised in the process. Rainald makes a shocking discovery.

In the season finale, Tina and Rainald make a desperate attempt to keep the bombs from going to Yemen. Tina unmasks the mastermind behind all the chaos, and in the process discovers something surprising about herself.