Tanja Bulkova arrives in Finland under the name Toini Salonen and, with the help of spy chief Rosenberg, becomes the secretary of engineer Rautavuori and discovers the drawings of a secret invention.
Elias, who is preparing for his wedding, dances drunk with a beggar in front of the church and dies of a heart attack. His fiancée Anna is devastated by grief and on the verge of suicide. In his despair, he experiences a religious awakening, which is supported by Antti, who is in love with Anna, and some of the villagers. The pastor sees the revivalist movement as a threat to himself, the church, and public order.
Joonas, a perpetual student living in a small town and working odd jobs, wants to spend May Day in Helsinki with his classmates from 30 years ago. His old friends are successful, but they have grown apart and are unhappy. Joonas helps them rediscover friendship and the joy of living.
