 John and Jane Smith are a married couple, both John and Jane are living unexciting lives and they have both been attending marriage therapy, as their lives haven t been passionate since they got married. But what they don t know about each other is that they are both professional assassins working for two rival agency s. John s latest assignment is to eliminate Benjaiman "Tank" Danz, but it all becomes complicated when Jane is also assigned to eliminate the same target that John has been assigned to kill. Learning that they are both assassins and failing to eliminate the target, both of John and Jane s employers decides that they try to take each other out (John kill Jane, Jane kill John). Engaged in a deadly game, John and Jane tries to take each other out and learns more about each other, as they try to finish the job and eliminate Danz.