A woman sold a luminous pearl to an antique shop, claiming it held a significant secret, but was soon killed by an unidentified female assassin (played by Wang Xiaofeng). The shopowner (played by Qin Pei) asked Mingzai for help in photographing the pearl, but was unexpectedly discovered and killed by the assassin, who also stole the pearl. During this period, Mingzai met a woman named Hong (played by Chong Chuhong) and fell in love with her at first sight. However, when he returned to the photography studio that night, he found the female assassin dead there, and the police also arrived at the scene. Hong appeared and saved Mingzai, willing to help him investigate the case. But later, Mingzai discovered that Hong was in cahoots with the assassin and had once tricked him into giving her his film, which left him deeply disappointed and confused. Despite this, Mingzai learned about Hong's background and experiences by chance, began to sympathize with her, and decided to secretly assist her. His kind deeds ultimately moved Hong, leading to a subtle change in their relationship. This story is not only filled with suspense and complex plot developments but also depicts the intricate and touching emotional shifts between Mingzai and Hong, showcasing their role transformations and emotional entanglements amidst the convoluted events.