Captain's daughter Josephine and common sailor Ralph Rackstraw are in love. However, their relationship is complicated by her arranged marriage to the high-ranking Sir Joseph Porter. A secret about the characters' true identities revealed by Little Buttercup, which leads to a farcical resolution. Set around a classic case of broken vows – the defendant having literally left the claimant at the altar – the trial bubbles over with emotion, humour, and downright chaos, leaving the jury divided.