Trick or Treat sees Corinna upstaged by a hot bread shop, Best Fresh bread, opening just down the street from her own bakery, Earthly Delights. Her apprentice, Jason, characterises Best Fresh bread as ' shit' but that doesn't make it any less popular. Meanwhile, the gorgeous Daniel's old friend George is staying with him while she establishes a base and a business in Melbourne. Georgiana Hope is tall, blonde, gorgeous and up to something. Daniel is making excuses and Corinna is worried about his absences and also the strange outbreak of madness which seems to be centred on Lonsdale Street. Will Corinna win through a maze of health regulations, missing boyfriends, sinister strangers, fraudulent companies and back alley ambushes? Or will this be the end for the Earthly Delights Bakery?