Reunited with Lancelot for the first time since their tragic accident, Tristan must learn to conquer his inner demons in order to save his mother’s life.

Tristan, the son of Meliodas and Elizabeth, inherits the power of the Goddess Clan and can heal people’s wounds and injuries, but he often ends up hurting others due to his inability to control his Demon Clan power. To protect his family, Tristan heads to Edinburgh Castle and meets a host of new friends along the way.