Zhong Yiyi appears to be a "delicate bride" forced to marry in her younger sister's place, but in truth, he is a top assassin feared throughout the underworld. He marries into the wealthy Shen family and becomes the "wife" of Shen Yanqing, a disabled young master, all to uncover the truth behind his sister's disappearance. Everyone thinks he's a pushover who can be manipulated at will, until they discover that the stepmother's bodyguards all vanished overnight, the butler who gave him a hard time was tossed into the courtyard with three broken ribs, and his wheelchair-bound "husband" was conveniently nowhere to be seen each time. When Zhong Yiyi finally identifies the real culprit, he is shocked to learn that Shen Yanqing's disability is an act, his wheelchair is a weapon, and this marriage in his sister's place was aimed at him from the very beginning. Two people with secret identities live under the same roof, testing each other and laying traps, neither willing to show their hand first.
