A series of apocalyptic signs begin to unfold around the world, coinciding with the prophecies from the Book of Revelation. Abby Quinn, a pregnant woman living in California, starts experiencing terrifying visions and dreams that seem linked to these catastrophic events. Her husband, Russell, is unaware of the depth of her distress, focusing on his job as a defense lawyer for a man facing execution. As Abby's anxiety about their unborn child's fate grows, she encounters David Bannon, a mysterious renter who takes up residence in their guesthouse. David's cryptic behavior and obscure knowledge unsettle Abby, pushing her to investigate further.

As Abby delves deeper into the mystery, she discovers ancient manuscripts and learns of the mystical "Signs" heralding the end times. She realizes that her child may be connected to these events in an unprecedented way. The closer Abby gets to the truth, the more she finds herself grappling with questions of faith, sacrifice, and destiny. Her journey takes her through hidden secrets and unexpected alliances, creating a race against time to prevent a looming global catastrophe. With the stakes impossibly high, Abby must make choices that will determine not just her fate but potentially the fate of humanity itself.