Science teacher Ryland Grace wakes up on a spaceship with no recollection of who he is or how he got there. As his memory returns, he begins to uncover his mission: solve the riddle of the mysterious substance causing the sun to die out. He must call on his scientific knowledge to save everything on Earth from extinction... but an unexpected friendship means he may not have to do it alone.

시즌 1・칼리 포천의 "1년마다"는 첫사랑의 낭만과 향수, 그리고 우리에게 영원히 지워지지 않는 자국을 남기는 사람들과 선택들에 관한 이야기다.