Thomas, a temporal operative, is reassigned to the Temporal Containment and Realignment Division to investigate an anomalous dimensional fracture near the Rift of Eternal Return. He teams up with a diverse group of allies, including Grimgold, Zephyr, and Raven, to contain the damage and prevent the Cartographers from rewriting the fabric of reality. Their mission takes them to the lost city of Erebos, where they uncover hidden secrets and patterns that govern the Timestream.