BAD ONE is a detective of Scotland Yard, peculiar and with an irritable and solitary character. Eager to investigate, he gets bored if it does not have between hands an interesting case. Finally a double murder offers to him the opportunity to show his "innate" qualities in the investigation of this crime: two persons are found in the Thames bundles and sewings of macabre form by the lips. Other personages serve him as walk-on to give the necessary game to the action and to the dialogue: his assistant sputterer Cocowa; his faithful friend and adviser Agatha; the chief Livingstone, with his singular theories on the life; Sara, the beautiful daughter of this one and eternal lover of Bad; an Islamist fanatic and bajito pawned, during the whole novel, in giving death to the detective. In addition to all his coworkers whose surnames resemble, singularly, well-known marks of tobacco. The history develops to the thread of the investigation of this one double murder and across a few hilarious situations, where there are not missing the suspense, the sex and the tenderness, the best investigator of all the times: Badwind third Eugene One, leads us for the streets of London towards a surprising end.