The peaceful waters of the Thames get decidedly choppy when brash self- made property developer Arthur Bullhead decides to cement the deal of a lifetime. He invites the local planning committee chairman and his family to spend what appears to be an idyllic weekend on board the Bunty, Bullhead's converted riverside barge. Bullhead has ulterior motives however, and the arrival of John Coombes with his wife Carol and their daughter leads to chaos for everyone, as personalities and lifestyles clash at every turn. Over the course of the weekend, Bullhead's unscrupulous approach to doing business proves overpowering to the straight-laced Coombes, whose indignation knows no bounds - until Bullhead makes an offer he can't possibly refuse. Or can he? Together with his skittish wife Mary and rebellious daughter Shirley, Bullhead gives the Coombes and their own unassuming daughter Wendy a weekend they'll never forget, which culminates in mutiny ... on the Bunty!
