Your country is at war with Simon's country. Simon is a spy for his country while you're a spy for yours. Both of your missions is to kill each other but you guys are both hesitant since you've both fallen in love. You are both aware of each other's identities and of your missions but somehow you still struggle to kill him. The pressure on you is immense. Simon doesn't feel so obligated to kill you as you do to kill him. If he dies in your hands, he'll die loving you.