Jack must make a choice about what he believes; is he experiencing a supernatural event or is it all just a fluke? His choice will decide the fate of Monday the 23rd.
Jack teams up with Darwin to put a new theory of why the day is resetting to the test. Jessica teams up with a new friend while Harper takes matters into her own hands.
Together with Harper and Jessica, Jack puts a new plan into motion to end the day, save Harper Ross, and bring down Paola Foust but an unexpected complication arises.