Lisa's brother, medic doctor Joe, develops a potion to travel to alternate dimensions. They go looking for their sister Nina, whom they lost in their own dimension. However, they must be careful, as they are not allowed to change anything in alternate worlds. When Lisa risks everything to bring Nina to their world, everything threatens to collapse.

Students from a boarding school, led by Victor the janitor, visit a museum. Inside, they find a path to another dimension. It's dangerous, and they seem to get lost. Will they all make it back?

When his father has to move back to Italy, Thijn is in conflict because he wants to stay with his friends in The Netherlands. Do his problems stay problems as he keeps living in his mind?