Rinne cannot see other people's faces. Growing up in a family that hunts and banishes spirits, she steps onto her first mission only to face an enemy stranger than any she had imagined. The encounter thrusts her into danger.
When a mysterious savior named Jugemu rescues her, Rinne learns that every realm—including the one she calls home, known as "Strike Worlds"—is under threat. Together they travel through a series of worlds on the brink of collapse, in the darkest depths. And along the way she forges an unlikely bond with him.