Shortly after his encounter with Tanjirou Kamado, the Water Hashira Giyuu Tomioka embarks on a mission to investigate several demon-related deaths that have occurred in the Snowy Mountains. The attacks are supposedly being instigated by a bear deprived of its den, but the Demon Slayer Corps believe otherwise. Upon arriving, he joins forces with Insect Hashira Shinobu Kochou. Throughout the duration of the mission, Giyuu discovers compassion and learns about the resilience of family.