The story follows a struggling young couple chasing the American dream only to realize their worst nightmare when they discover a demonic spirit in their new home. Mammon is the biblical word for the worship of wealth, and the couple discover that getting rich can come at a hefty price.
Kosim became rich after finding gold in the river in the village of Hirupbagja. He soon marries Sumi and lives a prosperous life as a landlord. When their child, Didi, was born, his soul was possessed by Albert Dominique's spirit, which was thirsty for blood and terrorized the villagers. Kosim tries to cover up this fact because he is currently running for the new Village Head. He must be able to beat Soleh, who has already won the sympathy of the villagers. But when the spirit threatens his family's life, Kosim decides to free Didi from the influence of Albert Dominique. To do this, Kosim must confront Dorman, a black sorcerer who wants to avenge his great-grandfather on the people who have destroyed his life.
A heartbroken man returns to the home he shared with his ex-boyfriend, where visceral memories force him to confront the fissures that led to their parting: when the 'casual threesome' they planned evolved into something more.