A teenage girl develops an otherworldly bond with an alien after it crash-lands in the desert. As government agents close in, she must protect her new friend, while uncovering a secret that could change the fate of both their worlds.

New mom Hallie is devoted to her baby, who had a heart transplant when she was born. Hallie is thrilled when she makes a new friend in Megan, but Hallie's life takes a sinister turn as danger seems to follow her every move.