Tycoon Sylvain, to take revenge on his enemy, forces his foe's son Stirling to marry him, using him as a substitute for his late true love Leo. At the wedding Stirling is forced to wear a humiliating collar; afterward the two engage in endless tug-of-war. The seemingly obedient Stirling is in fact laying plans step by step, using disguise and psychological tactics—deflecting the hostility around him while puncturing the perfect illusion of the "white moonlight," stirring the chessboard of the wealthy. In the cage of substitution he turns around and hunts the obsessive tycoon, staging a high-IQ duel of intertwined love and hate.
