The semi-coherent story of a pair of teenage intergalactic private eyes, "Kei" and "Yuri". Their code name is "Lovely Angels," but they're better known - universe-wide, in fact - as the "Dirty Pair". Their arrival at the scene of a mystery is always a source of hope and dread, since: 1) they always solve the case, 2) wherever they go, something gets horribly wrecked, up to and including entire planets. Lucky for them - but not-so-lucky for the rest of the universe - there are always some sort of extenuating circumstances that support their most often-used phrase, "It's not our fault".