Hypnos leader Mitsuo Yamaki attempts to send Digimon back to the Digital World. The Tamers began working together with Hypnos when the Devas invade the Real World. Calumon is captured, and the Tamers enter the Digital World to save him. When Impmon betrays the Tamers and kills Leomon, Jeri Kato falls into depression. After resolving conflicts with the Digimon Sovereigns, the Tamers learn that the Digimon are protecting themselves from humans and the Real World after the Digital World is invaded by the D-Reaper, a rogue clean-up program. As the Tamers return to the Real World, the D-Reaper kidnaps Jeri, manipulating and trapping her inside the body. When the D-Reaper begins to materialize in the Real World, the Tamers defeat it, using the program and saving Jeri. With both worlds restored, the children are forced to say goodbye to their Digimon partners, when they end up returning to the Digital World by the effects of the program. The series ends with Takato discovering the portal in the tunnel under his hiding place.