Mangled lips have been turning up all over London and the inhabitants are scared. Ten murders in ten weeks, all committed with a pistol, and still nobody has a clue who the rude killer is.

Jazz Phi Koo is a smart and charming professor with a fondness for love. She doesn't know it yet but she is the only one who can stop the thoughtless killer.

When her lover, Phil kay, is kidnapped, Jazz Koo finds herself thrown into the centre of the investigation. His only clue is a silver gun.

She enlists the help of a generous doctor called lee woo.

Can woo help Koo overcome her caffeine addiction and find the answers before the arrogant killer and his deadly pistol strike again?