Mauri Miettinen and his wife Anja are living in a happy marriage. Everything changes when Mauri's old acquaintance comes to visit and threatens to reveal Anja's dark past.
Helena, a beautiful school teacher in a countryside hamlet is just going to marry her childhood friend Erkki, but a day before the wedding her first love Jari arrives to the scene.
Tuula, Mirri and Aino are roommates at a nurse college. At her hospital internship, Aino works with Dr. Eero who has had an affair with Viivi, the director of the nurses' dormitory. At the same time, Tuula is starting to get closer to Mirri's fiancé Ragnar who has begun to doubt Mirri's love and loyalty.