Alex, whose singing career can't manage to succeed, accepts a strange job : to make a pensionner choir sing nursery rhymes. She finds out a bunch of out of control old people who dream of singing rock and roll music ! Her mission will be more complicated than expected...

In the heart of Morvan, Nico, the last vet in the area, struggles to save his patients, his clinic, and his family. When Michel, his partner and mentor, announces his retirement, Nico knows that the hard part is yet to come. "Don't worry, I've found the next generation" Except that ... The next generation is Alexandra, a 24-hour graduate, brilliant, misanthropic, and not at all willing to return to bury herself in the village of her childhood. Will Nico manage to make her stay?