Edgar Mallender is indisposed. Plagued by a painful condition, he spends his days soaking in the bathtub, surrounded by a library of books. But when a beautiful ballet dancer seeks his help, Edgar has to dry himself off and turn private detective. He is plunged into a dangerous world of ruthless businessmen and psychotic thugs, where only one thing can save him from being washed down the plughole: his knowledge of bathing... Who were the cleanest...