This nautical-themed musical comedy follows a group of performers known as The Barnacle Buoys as they prepare for a major performance at The Port Arms. Drawing on a repertoire that transforms show tunes, rock songs, and pop tracks into sea shanties, the group rehearses and refines their act ahead of the event.

Set within a lively performance framework, the show centers on vocal harmony and musical reinterpretation, with the ensemble reshaping familiar songs into maritime-inspired arrangements. The narrative unfolds through their preparations and performances, combining character interaction with a sequence of reworked musical numbers.