Dora Heldt: Herzlichen Glückwunsch, Sie haben gewonnen!

Psychologist Kara Bischoff and LKA Commissioner Sibylle Deininger, once a couple, are reunited by a brutal murder case.

Professional diver Sven has a guilty conscience: his job means he has too little time for his family. He even almost misses the cruise ship on which he is supposed to look after their daughter while his wife does research for an article about the ship. But then terrorists take over the MS SeaStar and take Sven's wife and daughter hostage. They threaten to blow up the entire ship.

Troubled Roula finds herself drawn to Leon, an author of children's books who has suffered an enormous emotional and creative blockage ever since his wife died in a motorcycle accident two years before. Leon has only his 12-year-old daughter Tanja to keep him company. As romance blooms between Leon and Roula, his daughter approves. Unfortunately, Roula is carrying heavy emotional baggage stemming from the incest she suffered at the hands of her father.