Rina and Yaco are two single brothers who live in a town in the interior of Santa Fe and work together in the warehouse in front of their house. Every day seems the same: without leaving, almost without speaking. But today is the carnival dance and something can change.
A special bond develops between plus-sized inflatable robot Baymax, and prodigy Hiro Hamada, who team up with a group of friends to form a band of high-tech heroes.
When Matthew explores the 'spiral' in his grandmother's garden (a strange structure built by his late grandfather) he discovers an entrance into the magical world of 'the Shadows' where he meets his new Shadow friends, Yorrick and Alice, and begins his great adventure.