Since losing her husband in a drunk-driving accident, Sophie has struggled to manage crippling grief, a full-time job, and the demands of parenting her devastated teen daughter. When her husband's best friend, a former physicist, reveals that he has been building a time-bending machine that could restore her former life, she is faced with an impossible choice. One push of a button and she can kill the drunk driver and bring her husband back but changing...

Worlds collide when Barry uses his superpowers to travel back in time in order to change the events of the past. But when his attempt to save his family inadvertently alters the future, Barry becomes trapped in a reality in which General Zod has returned, threatening annihilation, and there are no Superheroes to turn to. That is, unless Barry can coax a very different Batman out of retirement and rescue an imprisoned Kryptonian, albeit not the one...