13utterfly: Dollhouse - 13utterfly, #1

Zack is an undergrad who struggles with the grief of having lost Kristy in an accident, but as he is trying to rebuild his life everything is about to change when there are strange "atmospheric" events, and he finds a mysterious wristwatch-like device. Soon Zack embarks into a journey through time to uncover the secret behind an ancient alien civilization that sends him apocalyptic visions while he also closes uncomplete cycles of his own life.
Love, aliens, extra-terrestrial visions, time travel and a mission to stop the end of our world.