An interesting psychological story about one day in the life of a girl. The heroine of the film can not find a common language with her parents, who do not have time to take closer care of the child and understand the difference of an unusually sensitive girl.

Two strangers, Jerzy and Marta, accidentally end up holding tickets for the same sleeping chamber on an overnight train to the Baltic Sea coast. Also on board is Marta's spurned lover, who will not leave her alone. When the police enter the train in search of a murderer on the lam, rumors fly and everything seems to point toward one of the main characters as the culprit.