As the eldest daughter of the Su family, {Su Wan} seems to be carelessly pursuing fun, but in fact she hides a little secret of her love brain - her crush suddenly died in an "accident". The evidence at the scene pointed to an "accident", but she always felt something was wrong. In order to find out the truth, she found the private detective {Lu Yan}, who was famous for his caution, and worked hard to become his "assistant". Lu Yan thought she was troublesome at first, but gradually realized that this young lady seemed unreliable and could always find key clues with her eccentric imagination. As the mystery is solved, betrayal and deception come to light, and the darkened murderer is getting closer and closer. Su Wan stops joking and cooperates with Lu Yan to pursue the murderer by "pretending to be a pig and eating a tiger". In the desperate desire to survive on the verge of life and death, the two gradually get closer and uncover the shocking truth behind the "accident".
