At 7:07 PM, the occult club members are holding a ritual ceremony to summon "Master Salt" in Kamono Girls' Highschool in Tokyo, to help one of the members, Nanako, who has been struck by mysterious incidents. They draw a pentagon and a circle with purified salt, and burn a sealed envelope with a written wish. Out of nowhere, the divine protector, Master Salt appears with a blast of wind. She sees through the identity of the spirit that cursed Nanako and repels the curse. After that event, Nanako and her friends ask Master Salt to repel the curses that bring misery to people. They discover that this world is full of people who curse others. What will Master Salt and the girls encounter in the battle against a powerful enemy?