Based on

Movies like Thomas en Senior op het Spoor van Brute Berend (1985)

One day, as Senior wanders aimlessly through the city, his attention is drawn to demolition workers tearing down an old building. Among the rubble, Senior discovers an old model ship. He takes it home and begins studying old ship logs and nautical charts. Thomas also shows interest, and before he knows it, he finds himself embarking on a new adventure with his friends and Senior.