It's 1966 in London, England. The mod scene is in full swing. Nigel Davenport is hip to the scene and working to become the king of the mod in this part of the culture which rich British kids have made so popular.
During an exclusive party, Nigel eyes a mysterious and beautiful woman. He tries to catch up to her, but she moves too quick. The cat and mouse game ends when she catches Nigel, hands him a small toy robot, and then vanishes before Nigel can learn more about her.
Soon, there seems to be an assassin killing anyone Nigel is with. The mystery sniper appears to be toying with Nigel, prodding him to go in various directions, each turn containing a clue to a new puzzle throughout the adventure he’s fallen into!
Nigel is unable to get rid of the toy robot, because the assassin shoots even closer when Nigel tries to dispose of it. Nigel realizes it holds some clue to the mystery woman and possibly his life. His father, who has given Nigel money all his life, thinks Nigel made up the story for drug money or other troubles. He refuses to help him.
Now, for the first time, Nigel is on his own and must use London's mod scene to turn the tables. When he does, the secret to why this is all happening will take him deeper into a life he may not understand and in order to survive this ordeal he may have to do things that he never thought capable.
It’s an ending that will change Nigel's life and his future, no matter if he likes it or not, a girl that may or may not exist, a family secret, and a secret underground know only as...THE ASSASSIN'S GAME!