College student Ethan Blake wakes from a nightmare of his bus exploding—and sees a red death clock above every passenger: thirty minutes and falling. Only the mysterious Claire Morgan has no timer. She believes him because the curse once belonged to her. Mocked as a lunatic, Ethan risks arrest to stop the bus. But after he and Claire are thrown into the rain, the clocks keep falling. Can they outrun a death that refuses to be delayed?