When harboring a deep grudge, individuals can visit the Hell Correspondence website at midnight, where the enigmatic Hell Girl, Ai Enma, materializes to fulfill their vengeful desires. Yet, the price for dispatching their tormentors to Hell is hefty: the requester must forfeit their own soul to eternal damnation. Through her enduring role as the Hell Girl, Ai encounters numerous souls willing to pay this grave toll. In 'Jigoku Shoujo: Yoi no Togi,' Ai and her mysterious allies persist in guiding tormented spirits to the underworld. Recently, a peculiar girl starts shadowing them, devoid of memories and questioning Ai's purpose as the Hell Girl. Who is this enigmatic child, and how does she intertwine with Ai's fate?