Polish thriller directed by Jerzy Kawalerowicz. Jerzy (Leon Niemczyk) and Marta (Lucyna Winnicka) are two strangers on the run. By coincidence they happen to have bought the same ticket and even though both wanted privacy they decide to share a sleeping quarter for the duration of the journey. Tensions begin to rise when the police enter the train looking for a murderer and Jerzy quickly becomes a suspect, causing Marta to question whether she can trust him any longer.