Unfortunately, the movie still goes drastically wrong in the second half, deteriorating into a shrill horror flick dressed up in killer garb. Even at its best, it's a sick puppy with a twisted sense of humor and a keen interest in the macabre.
Cops start snooping around.
The original owners of that money stash are on the prowl. The housemates begin to interact in weird new ways as the smell of the money intensifies and danger lurks. That's the brilliant part of the film. Unlike Pulp Fiction, which seamlessly jumps between the lurid, the funny and the dramatic, Shallow Grave lurches from one style to another, as if Boyle lost control of the movie and the mutant ideas in it took over.