Fisherman's Friends is based on the true story of a group of singing fisherman from Port Isaac, a small coastal village in Cornwall, England. The film follows their journey from performing sea shanties on the local harbor to signing a recording contract with a major music label. Along the way, they navigate the challenges of fame, family relationships, and the clash between tradition and success.

After the unexpected success of their debut album, the Fisherman's Friends face the challenges of fame, second album syndrome, and performing at Glastonbury.