John (Brad Pitt) and Jane (Angelina Jolie) have been married for more than 7 years, and their life is as tasteless as fresh water. Marriage is like a grave, making them live a stagnant life. However, this is just an appearance. Behind the scenes, they each have exciting and thrilling careers - John and Jane belong to two different secret killer organizations, but they don't know each other's professional identities. Until they received a mission at the same time, the assassination target was the same person. The truth of the identity began to slowly reveal. After repeated attempts and guesses, Jane finally accidentally revealed her identity. So a fight between the brothers inevitably occurred. But they also began to realize that they were just a pawn of the organization. And in front of them is the lover who has lived together for 7 years.