He can see ghosts thanks to a home-made drug: his father's neurological medicine mixed with marijuana. On the trail of a serial killer, Officer Jayson Tagg ends up dead. So when Marbles' mother wants to sell the family farm, and the only way to buy the house from her is to take the money Tagg is giving Marbles in exchange for his help. Marbles agrees to that. The unlikely pair of stoner medium and ghost cop try to work things out as they deal with ghouls, perverts, a mysterious hooded figure, and a chance at love. The only way Marbles and Tagg will be able to solve the case with their souls intact is if they face their deepest regrets and break through their barriers.