Demons from the Dark Dimension pour through a portal in the wall of Pittingham Manor, the mid-point for an attack on high. They`re planning an assault. Into this chaos, stumbles 12-year-old ghostbusting psychic Alannah Malarra and burglar Worley Flint. Up until now they`ve only ever faced tame treasure-hording ghosts, but this is something else. Their only hope is a plucky angel police patrol on a routine earth-monitoring mission. Enter Inspector Flhi Swift and officers Yell and Gloom.