The Train (2021)

In the year 3050, the Little One and a group of kids are separated from their parents and sent to live on a train that orbits outer space. There they don't age and must keep emotionally balanced through dance in order to keep the train fueled up. When the Little One goes missing without a trace, they must all work together to figure out what happened to her all while keeping their emotions balanced, otherwise they risk a catastrophic event.