While on a desperately needed get away, Rick and Rachel Davis' act of kindness uncovers an ancient Chaco Canyon secret, one closely guarded for centuries. Their desire for a restful period of reflection and healing, after their youngest son's murder, is soon turned into a series of nonstop, nerve-racking time-jumping exploits.
Rachel has always wished Rick were her children's biological father. When Rick's belief in time travel is affirmed by an object planted by himself in the past, he seizes the opportunity to travel back in time, attempting to make Rachel's plan a reality. When that plan unravels, at the hands of his younger self, he has no choice but to time jump multiple times to thwart the murder of their son.
Already in a fragile state from her son's death, Rachel's emotional and physical fate becomes uncertain, along with that of their grandson, when a time jumping accident leaves them alone and vulnerable in the isolated New Mexico desert. Rick's naivety about time travel, and his emotionally charged actions inadvertently trigger a series of unforeseen consequences, leading to a nationwide manhunt that spans thirty years. But more importantly, they trigger Rachel's feelings of abandonment and betrayal, leaving her to wonder if he will ever return.