When an old flame of Gaius's arrives in Camelot, Merlin is pleased to see a different side to his curmudgeonly mentor. But after discovering she is under the influence of a Manticore, a creature from the Old Religion, Merlin has no choice but to tell his old friend of Alice's evil intentions.

The only rule in Camelot's legendary tournament is that there are no rules. The mythic city fills with terrifying warriors and are joined by Gilli, who despite his small stature has victory in his sights and a secret weapon to help him - magic.