After freeing numerous women from possessed hearts, Keima Katsuragi, known as the 'God of Conquest,' faces a new mission: locating the Jupiter Sisters, ancient goddesses who once sealed away Old Hell. Diana, a goddess within his childhood friend Tenri Ayukawa, reveals that these sisters now reside in the girls he previously assisted. Their reunion could permanently vanquish the runaway spirits and release Keima from his exorcism duties. Reluctant initially, Keima's perspective shifts when tragedy strikes one of the hosts. As he learns of the goddesses being hunted by the enigmatic Vintage organization, a race against time begins to unite the sisters and save the endangered girl. Determined more than ever, Keima joins forces with demons Elsie and Haqua to reclaim the hearts he had won before. Yet, the path ahead is fraught with challenges as the repercussions of his past conquests come to light.