Un intruso en mi cuaderno

Butterflies invade the notebook of Mariano, a would-be astronaut, footballer and detective. They are of every shape, size and colour. But none of them can fly, because they’re drawn. He decides to find the mysterious creator of the butterflies. When he’s close to solving the enigma something changes: a new butterfly with a sad expression appears. What has happened to the person drawing them? What will Mariano say to him?