Ghost of a flea

Renegade occultist John Constantine (Keanu Reeves), who has literally been to hell and back, teams up with skeptical policewoman Angela Dodson (Rachel Weisz) to solve the mysterious suicide of her twin sister. Their investigation takes them through the world of demons and angels that exists just beneath the landscape of contemporary Los Angeles. Based on the DC-Vertigo comic book Hellblazer.