An action-filled, suspenseful story that pits InuYasha against a powerful demon from China named Menomaru. Two hundred years ago, InuYasha's father managed to seal Menomaru's evil demon father, Hyoga, away in a tomb, but a shard from the magical Shikon Jewel freed the son, Menomaru, allowing him to escape his imprisonment and threaten the entire land. It now falls to InuYasha, along with his friends, to find away to stop Menomaru from wrecking havoc...

Within the dark recesses of Horai Island, a group of half-demons lives under the demonic rule of the Four War Gods. Escaping with barely a shred of hope, Ai, the youngest of the half-demons, returns to the island to face them with InuYasha's help. Fourth feature film based on the characters in the manga and television series.

When twelve-year-old River's only friend is kidnapped and dragged to the terrifying spirit world of The Otherwoods, they have no choice but to face the world's monsters and their own fears to become the hero they were destined to be.