Noémie Merlant (Portrait of a Lady on Fire) stars as Jeanne, a shy young woman, works at night in an amusement park where she likes to stroll cleaning the paths. She lives with her mother, the exuberant and invasive Margarette, and struggles to find her place in the world. Her life lights up when the park acquires a new thrill ride, the extraordinary and majestic Jumbo. It's love at first sight. Based on a true story - JUMBO is an extraordinary romance.