Arriving in Helsinki, a nameless man is beaten within an inch of his life by thugs, miraculously recovering only to find that he has completely lost his memory. Back on the streets, he attempts to begin again from zero, befriending a moody dog and becoming besotted with a Salvation Army volunteer.

Iris is a shy and dowdy young woman stuck in a dead-end job at a match factory, who dreams of finding love at the local dancehall. Finding herself pregnant after a one-night stand and abandoned by the father, Iris finally decides the time has come to get even and she begins to plot her revenge.