Mao Buyu, heir to a legendary detective family, falls for Chu Yunshang, a flower seller hiding her true identity as the leader of a notorious thieves’ guild. As Mao Buyu vows to capture the elusive guild leader to earn a promotion and win Yunshang’s hand, a secret game of cat and mouse unfolds, where love, loyalty, and identity collide.

神捕世家传人毛不遇与隐瞒了盗门魁首身份的卖花姑娘楚云裳相爱。毛不遇为了打破祖训迎娶卖花姑娘云裳，立下军令状擒获盗门魁首晋升六扇门捕头，而面对传承家族使命的责任，云裳只好在盗门魁首和卖花姑娘之间不断转换身份，一场猫鼠之战悄然展开。