Shy and cute Aaro meets the mysterious and intelligent Maura. They begin a passionate relationship that seems too good to be true. Suddenly, Maura disappears. Aaro searches for her and discovers that she has invented her own identity.

Erkka receives a threatening message to leave Linda and Ronja alone. Linda tells Erkka that she is not Ronja's real mother, and Erkka demands an explanation from Maura.

Maura convinces Aaro to go on another boat trip. When they arrive on a deserted island, Maura discovers that her sister and Erkka are also there. Erkka waits for the right opportunity, then threatens Maura.

Maura takes a phone call from a frightened Ronja because Erkka has moved in with them. Ronja has a strange feeling about him. Maura realizes that the girl is in danger.