Oscar and Teo (13 and 11 years old) are two brothers, very different from each other, who will have to face the loss of their mother, a scientist obsessed with wormholes.

Nico receives a letter from his mother on his birthday, which turns the day into a gymkhana to get his gift. He will have to climb the highest mountain of dust, duel with the baker's son until finally facing the toughest test: realizing that this is his last day as a child.

Pablo spends the afternoons in his neighbourhood with his older brother and his friends. Summer is the craziest scenario of their lives, as if the world had been left to children alone. Despite the confusing reality in which he grows up, for Pablo every day is an opportunity to discover the world and understand it in his own way.