Violinist Eero Viida's wife Ruth has left her husband but wants to return. Eero no longer loves his spouse and rejects her advances. Ruth shoots her husband, who ends up in the hospital. Eero becomes attached to Marja, a student of his accompanist Pallas, which drives the jealous Ruth to take extreme measures.

The old man at the Eirtola house warns the new maid Eriikka about the fate of Jenny, the summer girl. Jouko, a university student from Eirtola, arrives home for the summer and begins to court the pretty maid. At the cattle shed, Eriikka finds a box, the contents of which she examines together with Pastor Tuomo Ahomaa. The tragic fate of Jenny, the summer girl, is revealed.