A young, orphaned swift named Manou is raised by a pair of seagulls and grows up believing he is one of them. Despite his best efforts to blend in, he struggles with the fact that he can't swim or fish like his seagull family. When Manou fails an important test during a fishing expedition, he feels humiliated and sets out on his own journey to prove his worth. Along the way, Manou discovers his true identity and the incredible skills that come with being a swift. His adventure leads him to meet members of his own species, where he learns about their unique abilities and lifestyle.

As Manou continues to find his place in the world, he uncovers a sinister threat facing both the swifts and the seagulls. Despite feeling like an outsider in both communities, he is determined to unite them against a common enemy. Manou's courage, newfound abilities, and the friendships he forms play a critical role in addressing the danger that looms over their coastal home. By embracing his true nature, Manou demonstrates that differences can be strengths rather than weaknesses, and that harmony can be achieved through understanding and cooperation.