The mysterious Agent J (played by Jolin Tsai), who has no past and no records, uses ruthless marksmanship and strong skills to carry out secret missions without files; after receiving the order, Agent J’s latest mission is to He went to assassinate the professional bodyguard S (played by Kim Jae-won) who had been tracking him. At the moment of executing the mission, Agent J followed S to a rooftop. When S turned around and saw J’s true face, before he died, he revealed a familiar figure. Smiling, Agent J also completed the mission... Since Agent J shot S, the familiar smile before S's death often lingered in Agent J's mind, so Agent J decided to start investigating and tracking who S was. In his apartment, Agent J discovered that he was actually the girl who disappeared suddenly two years ago. It turned out that S had been heartbroken in the past two years and had been waiting in Paris for the girl he loved to reappear. He did not know that she was actually kidnapped by a secret organization. Agent J has long been brainwashed and trained to become an agent... Ironically, the rooftop where S was shot dead by Agent J is also the same rooftop where the girl and S agreed to meet. The beautiful agreement was a farewell to death. Agent J Shooting his past and love...the fate of an agent...

The plot synopsis of "Agent J" part two "Cracks in Memory":

Agent J is in prison Being scouted by a secret organization, he exchanged an assassination mission for his freedom, and in the name of pretending to escape from prison, he acted as a black hand; Agent J's assassination target "Bluebeard" has already found himself the target of Agent J... In London On the street, Agent J, who transformed into an ordinary girl, was followed by an unknown person. In the process, he met Lu Xiaodong (played by Feng Delun) who was a photographer. The two fell in love at first sight and started a loving but uneasy relationship with Lu Xiaodong. Love; while the two are madly in love, each other discovers each other's true identity (JOLIN is Agent J, Xiaodong is a spy commissioned by Blue Beard). The betrayal and trust between lovers are pulling at each other. Is it love? Or hatred? Should Agent J choose the perfect mission? Or bravely run for true love?

Plot synopsis of the "Agent J" trilogy "Faith of Illusion":

In an undercover operation close to the undercover boss of the underworld, Agent J incarnates in the bustling city of Bangkok. A singer who performed in a large DISCO unexpectedly discovered that her boyfriend Vince, who died in the line of duty many years ago, was actually involved. Although Agent J was angry but helpless when he discovered the fact that his boyfriend had faked his death, but in this operation, In the process, the two rekindled their love, but they also fell into crisis! Agent J was assigned by a secret organization to rescue Vince, who was working as an undercover gangster, and V turned out to be his boyfriend who died many years ago. They had a fierce shootout and chase with the gangster. In the end, V actually died during an operation, leaving him with no chance of completing the mission. The lonely agent J was so sad that she couldn't believe that V really left her this time...