Teenage geek Fergie Ferguson and his BF Sid, the ghost of a punk rocker who only Fergie can see or hear, are on the lam for a murder they didn't exactly commit. They've made it to London but on their tail are the police, the quirky paranormal investigation agency the Department of Extra-Usual Affairs, and some really freaky magpie monsters, so there's not (much) time for sightseeing.