Annie is sent to spend the Hallow'een holiday with her grandmother in Stillwater. Her mother has gone on a 'business trip' with her new husband and Annie is surplus to requirements. Confined to her room for bad behaviour, she meets the mysterious Amy and escapes with her through her bedroom window to 'trick or treat'. But Amy is not all she seems and Annie gets more than she's bargained for. Because sometimes the dead just won't lie down.