This is a story about Paulina P. in which we follow her adventures in class and at home, as well as all the problems she successfully overcomes during the school year. The movie is based on a famous children's book in which she talks about her friendship, love, and family-related problems through comic situations. The plot of the movie itself is set in the real world, with a touch of "magic".

Paulina P. is back, once again facing the challenges of growing up, such as overly strict adults and middle school bullies. However, something even worse will enter her life after she learns about her grandmother's fatal condition.

Momo is a young orphan girl who lives in the ruins of an old Roman amphitheater and becomes friends with everybody in the neighborhood. But when a powerful international corporation starts stealing everybody’s time, nobody has any time left for her, let alone their friends or families. Momo, together with Master Hora, the custodian of time, are the only ones who can go up against the time thieves before all is lost forever.