Mu Nanxi is forced to replace her sister and marry the comatose Lu Beichen. Initially, she only intended to investigate her grandmother's illness, but soon becomes embroiled in the complicated affairs of the Lu family. She tries to keep a low profile by disguising herself. However, Lu Beichen unexpectedly wakes up and reveals his cunning nature. Lu Ciyuan attempts to seize control of the Lu family, but his plot is soon uncovered. Mu Nanxi, disguised as a waitress, infiltrates a club to investigate, only to be mistaken for someone else by Lu Beichen. As their relationship slowly grows, Mu Nanxi uses her medical skills to treat Lu Beichen, and he begins to realize there's more to her than meets the eye, deciding to learn more about her. Meanwhile, both of them investigate secret matters, uncovering each other's hidden actions. Lu Beichen grows suspicious of Mu Nanxi's true identity, and their feelings remain tangled with the mysteries surrounding them.