Momo

A young girl named Momo, whose origins are a mystery, takes up residence in the ruins of an old amphitheater on the outskirts of a city. The local community, composed of poor but kind people, quickly grows fond of her and collectively provides for her needs. Momo possesses an extraordinary talent for listening. Her deep, empathetic attention helps people solve their own problems, find inspiration, and reconcile their differences. Her presence also inspires the neighborhood children to invent wonderfully imaginative games. Momo’s closest friends are Beppo Roadsweeper, a quiet, thoughtful old man, and Guido Guide, a charismatic young storyteller who dreams of fame and fortune.

A sinister force begins to spread through the city in the form of the men in grey. They are agents of the Timesaving Bank, and their purpose is to steal time from humans. An agent visits a local barber, Mr. Figaro, and uses complex calculations to convince him that he is wasting his life. The agent persuades Figaro to “save” time by rushing through his work and cutting short his relationships with family and friends. This philosophy of obsessive efficiency spreads, making the city’s inhabitants wealthy and productive but also joyless, anxious, and unfriendly.

Momo notices that her adult friends no longer visit and that the children who come to the amphitheater are bored and sullen. She visits some of her old friends and finds them stressed and unhappy. Her listening helps one of them, Nino the innkeeper, to reconnect with his better self. Soon after, a man in grey, Agent No. BLW/553/c, confronts Momo, attempting to corrupt her with an endlessly distracting doll. Momo’s unique listening ability forces the agent to confess the truth: the men in grey are time-thieves who fear her influence. The agent panics and flees.

Momo shares this revelation with Beppo and Guido. Guido, excited by the discovery, organizes the local children into a demonstration to expose the men in grey to the entire city. They make posters and march through the streets, inviting everyone to a meeting at the amphitheater. The demonstration fails, as the men in grey ensure not a single adult has time to attend. That night, Beppo witnesses a secret tribunal of the men in grey. They find Agent No. BLW/553/c guilty of treason for revealing their secrets and sentence him to be deprived of all time, causing him to dissolve into nothing. The tribunal then resolves to capture and "neutralize" Momo. As Beppo rushes to warn her, a mysterious tortoise named Cassiopeia appears to Momo with the words "FOLLOW ME" illuminated on her shell.

Momo follows Cassiopeia, who can see thirty minutes into the future, allowing them to evade the city-wide manhunt launched by the men in grey. They enter a strange district where time functions in reverse, making it impossible for their pursuers to catch them. They arrive at Nowhere House, the home of Professor Secundus Minutus Hora, the custodian of all human time. Professor Hora explains that the men in grey are parasitic beings who subsist on the "dead" time stolen from people. He shows Momo the source of her own time, a golden dome where a giant pendulum swings over a dark lake, causing unique and beautiful "hour-lilies" to bloom and fade with each passing moment. While Momo is safe in Nowhere House, the men in grey, realizing they cannot capture her, devise a new plan to isolate her by corrupting her friends.

Momo awakens back in the amphitheater to discover that a year and a day have passed. In her absence, the men in grey have transformed her friends. Guido is now a rich and famous storyteller, but he is creatively bankrupt and miserable, threatened into compliance by the men in grey. Beppo has been tricked into believing Momo is a prisoner and now works ceaselessly to save a fictional ransom of 100,000 hours. The children have all been confined to "child depots," where they are taught sterile, "useful" games and have forgotten how to play imaginatively.

Momo finds a year-old letter from Guido and goes to Nino’s inn, now a sterile fast-food restaurant, where the rushed innkeeper tells her what has happened. She finds Guido’s villa and has a brief, frantic reunion as he is being rushed to the airport. Trapped and unhappy, he begs her to stay with him, but she realizes she cannot save him that way and refuses. He is whisked away, and Momo discovers that Cassiopeia had mysteriously departed just before his arrival. She endures a period of profound loneliness until a man in grey confronts her. He reveals that her friends are their prisoners and offers her a deal: if she leads them to Professor Hora, they will be released. Momo refuses, stating that only Cassiopeia knows the way. The men in grey immediately issue an alert to find the tortoise.

Cassiopeia reappears, and the entire army of men in grey begins to pursue them, intending for the tortoise to lead them to their enemy. Momo and Cassiopeia reach Nowhere House just ahead of them. Professor Hora explains that they are under siege; the men in grey are creating a fog of "dead time" from their cigars that will poison the time he sends to the world, causing a fatal epidemic of "deadly tedium." He reveals a desperate plan: he will fall asleep, which will stop time for everyone. Momo will be given a single hour-lily, granting her one hour of time in the frozen world. In that hour, she must follow the men in grey to their secret underground time store, lock them out, and release all the stolen time. This act will awaken the professor and restart the world.

Time stops. Momo follows the panicking men in grey through the motionless city. During the chase, she passes a frozen Beppo, a heartbreaking sight that strengthens her resolve. She follows the last survivors into their underground headquarters, where she witnesses them reduce their own numbers through a series of coin tosses to conserve their cigar supply. Using the power of her hour-lily to move objects in the frozen world, Momo shuts and locks the massive steel door to the time store. The last of the men in grey dissolves after his cigar goes out. Momo opens the vault, releasing millions of stolen hour-lilies. A great storm of flowers carries her back to the city as time restarts.

The stolen time returns to the people, and the city is instantly transformed into a place of joy, leisure, and friendliness. Momo is reunited with Beppo, and they return to the amphitheater to find all their friends gathered, their former happiness and camaraderie returned. They hold a joyous celebration that lasts late into the night.