1945. A packed ferry drifts down the Vistula after its tow rope snaps. Only a single militiaman sees notices the ferry and organizes a rescue before the it drifts into the Gdańsk Bay, which is still full of mines.
It seems that nothing can ruin Henryk’s (Wieńczysław Gliński) happy life. He’s a respected lawyer with a loving son and wife. One day, he receives a letter from the prosecutor’s office. He’s accused of collaborating with the Gestapo. It’s an echo of his past under occupation.