Juanjo is an asthmatic boy who has lived protected by his family to the point of drowning him. And Miquel grows up in a family with an absent father. His mother tries to get ahead by herself, but she does not always succeed.

Heavies Tendres is about the relationship between Juanjo and Miquel, two teenage boys from Barcelona in 1991 who will take in their friendship and heavy music refuge from the gray world they live in.