It's summer in Lisbon and Nicolau is an undecided boy. Among his doubts about the university course to follow and what kind of girl to choose for his girlfriend, Nicolau spends his days trying to figure out who he wants to be when he's bigger. The problem is, he's about to finish the secondary exams, he is already big, without having things clearer. From indecision to indecision, Nicolau navigates in sight, with the only compass for his possible choices being the girls he is going to fall in love and with those he imagine as many possible futures.

It's a summer weekend in a country house near Sintra, in Portugal. Fourteen-year-old Nicolau is spending a couple of days with his older brother Simão and his friends, all of them in their late twenties. Everyone is drawn to the beautiful and quiet Maria do Mar, but Nicolau will see his life the most deeply shaken by her. Between homework and tree-climbing, stories about a deceased philandering grandfather and the origins of the tortellini's shape, a friend in a costume nursing a broken heart and seduction games, Nicolau observes this group of young adults.