It’s Halloween in Finglas, and everyone is getting into the spooky spirit of things. Agnes is ready for the trick or treaters, but she gets more than she bargained for when she receives a surprising visitor from her past. As no-one else can see her ghostly guest, they think she’s gone mad - not even Doctor Flynn can help. Luckily, Father Damien is on hand, and with a little help from Grandad, they get rid of the unwanted guest in time to head down to Foley’s for a fancy-dress party.