The end of the world is underway as Tsukasa vows to destroy it himself, pulling the Riders to safety so that they can regroup. With the loss of the Riders, the various worlds have merged, giving Swartz the means to eliminate them all and save his own world. Despite his vow, Tsukasa refuses to abandon the people of Zi-O’s world and the four Riders come up with a plan, starting with Sougo facing Oma Zi-O once more in 2068 and planting the seeds for Phase 2…