At the Time Eliminator, a one-of-a-kind service can eliminate a past event. Despite his youthful looks, Rex, a time traveler, is a seasoned professional who comes equipped with gadgets and a communication device to aid him in his trips to the past. While Rex usually accepts cases for financial gain, he's searching for opportunities to acquire the mystical "Babylon Item." In the inaugural case of the series, the final living descendant of Fred Abberline seeks out Rex's assistance. Abberline was part of the sleuths who failed to solve Jack the Ripper's heinous murders, which has doomed the Abberline lineage. Could it be that someone in history employed the Babylon Item, causing the family's misfortune? Rex must journey back to the Jack the Ripper era to discover the root of the curse and neutralize it to free the Abberline clan.