Brina, a city cat, moved to the mountains with her owners for a summer holiday. Here she meets stray cats who call themselves 'The Gang of the Feline Sun.' Her new friends convince her to run away with them and become a free cat. But while Brina enjoys her newfound freedom, her young owners are distraught over losing her. Brina is terribly conflicted and must choose to either live with her owners, where it's safe, but confined, or go free in the wilderness.