When Mon-El lost Kara, his fiancee, in an alien invasion one year ago, he thought he’d never see her again. Since then he’s been trying to build himself a life and pick up whatever pieces of him was left after losing her, and he’s been failing miserably. Just when he thinks he can’t go on anymore and loses all hope, he’s thrust into a world completely different than his; a world in which everything he used to know is changed. Which includes Kara Danvers never dying on that fateful night.
Mon-El soon finds out it won’t be as easy as he hoped it would be to reverse the changes, especially when with each passing day he gets more sucked up into his new life. Because in the end, reversing everything means losing Kara all over again, and he’s not sure he’s strong enough to go through that a second time.