Lena is happily married to Bodo. She spots a very attractive man on a tram and has a spontaneous sexual encounter with him. The stranger, Martin, also thinks this secret encounter will not harm his marriage to Solveig. What appeared to be a harmless adventure turns into to a new territory of desire and longing. Lena and Martin can't stay away from each other. They struggle with the temptation of exchanging their old lives for a new one and at the same time they fear every day life will catch up with them.