Madeleine Chan's father is missing in Obscure City and his young daughter has no clue to his whereabouts. The girl is desperate to find him and enlists the aid of Kassandra Killjoy, a private detective with extraordinary skills; not forgetting Hime the cat, her tuna-loving Familiar. Obscure City is where demons and angels mingle and at night time, there is no telling who is good and who is evil. The Swordsman holds the clues to the mystery but finding him is no simple task. This fast-moving and comical tale throws Mad Chan and Killjoy into many life-threatening situations, all in a determined quest for the truth.