The show is about Juanjo and Miquel, two teenage boys from Barcelona in 1991 who will find in their friendship and heavy music a refuge from the gray world in which they live. Juanjo is an asthmatic boy who has lived protected by his family to the point of drowning him. Miquel belongs to a family with an absent father. Her mother tries to get by herself, but she doesn't always succeed. "Heavies tender" talks about the first emotions and that crucial moment in life where you go from childhood to maturity. A tender and fun series that excites and will make us relive the moments of our own adolescence.