Karin takes in a woman and her alleged son, who have been injured in a storm raging on the island. Karin's investigative instinct immediately awakens, as the woman also has signs of severe abuse. Meanwhile, Rainer Witt investigates a robbery in which the antique dealer Christian Zoschitz was shot. As the storm continues to intensify, everyone has to barricade themselves. While Karin and Merle seek shelter in the Witt house with the guests, Rainer is stuck at the scene of the crime without support. Chaos reigns in the presidium with Ellen, Holm and Dorit as well as some witnesses when the power goes out ...