Summer vacation has just begun. In honor of it, Serena Rapper and Lennart Lindberg decide to go on holiday. Ricky gets a new bicycle as a consolation, but it disappears mysteriously. Ricky and Nelly Noodlehead go looking for it which turns into a thrilling adventure.

In the early 1960s, Bella, her husband Kajus and their young son, Thomas, spend seemingly endless holidays together. Next year the arrival of new neighbors, Rosa and Gabe and their two daughters, start changing their lives.

Finnish Kerttu Nuorteva is spying for the Russians in Helsinki during World War II. She is arrested and interrogated in the hope that she will uncover the Soviet Union espionage tactics.