Yuito and Kasane spend some quality time with their mom. After she tells them about dimension entanglements and the Kunad Gate, Yuito and Kasane set off to unravel them. Will they succeed and return safely? And what is their mother not telling them?

All hell breaks loose when the Extinction Belt descends to a record-low elevation. Kaito resumes his post as the Others threaten to overrun Suoh. Yuito and company head into the Sumeragi Mausoleum to unravel the last entanglement.