Gagarine follows Yuri, a bright and determined teenager who has spent his whole life in Gagarin Towers, a sprawling housing project in the Parisian suburbs. Despite the poverty and violence that surrounds him, Yuri dreams of one day becoming an astronaut and exploring the stars. He spends his days tinkering with machines and dreaming of the universe, and he looks up to the Soviet cosmonaut Yuri Gagarin as a hero.
When plans are announced to demolish Gagarin Towers and replace them with a luxury development, Yuri and his friends Diana and Houssam decide to take action. They form a resistance group to protest the demolition of their home, turning the project into their own personal starship. Using their ingenuity and resourcefulness, they transform the towers into a haven for creativity and imagination, hosting art shows, music festivals, and even constructing a rocketship out of scrap metal.
As the pressure to vacate the towers mounts, Yuri becomes more and more determined to save his home and his dreams. With the help of his friends and the community they have built, he embarks on a daring mission to launch his rocketship and show the world the magic that can be created in even the bleakest of environments.
Gagarine is a touching and inspiring story that celebrates the human spirit and the power of creativity and imagination to overcome adversity. It is a reminder that even in the darkest of places, there is always hope for a brighter future.