When the team attend a Dark Morris Dancing event, the‘Legend of the Knuckerhole Dragon', Margo finds herself atthe centre of a crime when a member of her team collapsesduring their performance. With a severe allergic reaction toblame, and the victim's epi-pen case empty, Humphrey isstumped as to how the attack was triggered unseen whilst alleyes were on the stage.As jealousy and secrets come to light,the targeting of the victim's allergic reaction begins to painta sinister picture. And with a connection to the crime, Margois put to the test as she goes undercover to see what clues afamiliar face might hold.Meanwhile, Humphrey and Martha take abig step on their homeowning journey, but Humphrey's mind ispreoccupied when a powerful figure from the Hub arrives at thestation looking for answers. Elsewhere, Esther is floored whenZoe suddenly reveals her decision to travel the world.