Momo is a young orphan girl living in the ruins of an old Roman amphitheater. She spends her days with her best friend Gino and always has time for her neighbors, but the interference of a powerful international corporation means that suddenly nobody has time for her anymore. Not even Gino! When Momo is at her most desperate, a mysterious turtle leads her to Master Hora, the Guardian of Time, and they race against the clock to fight the time thieves and take back what was stolen.