The first of three stories set in the London Underground. It's Halloween and all the mice who live in the Underground are enjoying a big party - all except Nigel. He is wearing his ghost outfit and he sets off for the great cheese counter at Harrods. In the Pet Department he meets a ghostly white mouse. The white mouse is not the ghost Nigel thinks he is but just a sad, lonely mouse. He takes the white mouse back to live happily in the Underground with his other mouse friends.