A 21st-century office worker travels back to 1947 Chicago while showering, mistaken by a mafia queen for the legendary top assassin "Jade-faced Demon" who vanished ten years ago. After a one-night stand, he's forced to keep playing this cold-blooded legend, using modern knowledge to bluff and bulldoze his way through. Just as he gains a foothold and wins the mafia queen's heart, the real Jade-faced Demon — his twin brother — returns. And that woman has been in love with his brother for ten years.
