Conditional jockey Kye McMahon fears that his criminal past is catching up with him when a fellow rider is viciously attacked in an apparent case of mistaken identity. As star racehorse Tabikat and jockey Merlin ap Rhys take on the million pound challenge of the jump racing Triple Crown, trainer James Sampfield Peveril and his team find themselves faced with a series of mysterious setbacks. Meanwhile, the sale of a young colt called Katalyst resurrects ghosts from breeder Eoghan Foley's traumatic past. As a cyber criminal's tortuous plan is carried out from beyond the grave, the Cheltenham Festival provides the setting for the dramatic revelation of a thirty year old secret.