Taking place during the height of the Christmas season, Synchronic follows a husband and wife, Colleen and Charles Martin, as their marriage drifts apart. While Colleen and daughter Philippa make a head start into Jojo's shopping store, Charles stays behind attempting to find a empty parking spot. Their distance in this moment kickstarts a chain of life altering events as a stranger yet familiar man threatens their livelihood with a weapon of the future, time reversal.