Milllionaire Nicholas Thorne is brains behind the game Scorceror. He is called back to the office and the some has stolen £2.1 million. He receives a coded message to meet at a secret location and sees the kidnapping of his ex-wife Jenny.
Nick starts to play "The One Game". Tom Drake attempts to raise cash to save Scocerer. A clue leads Nick to see his ex-wife and help a wounded man at a live firing range. Magnus jousts Nick while riding a motorbike and leaves him injured.
Nick escapes death, at a church, while Magnus guard dogs kill Jenny's lover Gavin. Magnus tries to recruit Tom only to invite Lord Maine to launch an hostile takeover. Nick is conned into fighting a knight in armor but left in jail.
Nick is bombarded with mental disintegration but escapes to stop Tom selling Scorcerer to Lord Maine. He saves Jenny and they learn Magnus died seven months before. He now has one last test to save Magnus daughter and win the 'One Game'.