Until the time machine becomes a reality, a person can always ride a bicycle to relive his or her childhood. Bicycle Days takes one on a trip down memory lane for anybody and everybody, whose childhood had a lot of bicycle rides. Bicycle Days is a heartwarming story of a village boy and his mentor.

Kati Sinenmaa wanted to break away from the dependence on society, and in the spring of 2001 she started building her own fortress in the forest in Pasila. Hiltunen photographed the life of Sinenmaa for 4 years.

In the film we see an oil tanker sailing across the Gulf of Finland. On her way she passes through one of the most beautiful and most valuable marine areas. At the same time, under the surface, the medusa - a species dating back 500 million years is undergoing a transformation that takes six months. In the film these very different creations traverse the Gulf of Finland and also meet each other and abundance of the ocean life.