Tabloid Caligula centers on Robert, an aging criminal and wannabe businessman. Part mentor, part historian, part psycopath, he strides about his storeroom like a low-rent Godfather, filling his young protege, Joe, with tales of underworld glamour and ancient historical conquests. Joe dreams of being just like Robert. But, Robert's not telling Joe everything he knows. Then in walks Mary, and Robert's game is up.