Death note

Plot: Light Yagami is a young but bright high school student who has until recently led a boring and uneventful life. That changed very quickly when he found a strange notebook with the title "Death Note". It wasn't until later that he realized that this "Death Note" was the tool of a shinigami (god of death in Japanese) from another world named Ryuk, and that it had the power to kill whoever's name was written on its pages, so long as the writer knew the victim's face as well so it won't kill anyone sharing the same name. Light realises his ability to kill whomever he wishes, and he uses it to begin a "cleansing" of the world from evil.

It does not take the police long to realise that somebody is responsible for the mysterious deaths of criminals, and he is then soon hunted by the Japanese police force and a mysterious detective known as "L". So as Light works towards his "perfect" world, devoid of crime and injustice, L works to catch the mysterious murderer, dubbed "Kira" (Japanese pronunciation of Killer) by the press and end the increasingly senseless deaths of criminals and anyone who gets too close to the truth. L and Light soon begin a cat and mouse chase  to see who will be the first to have their identities exposed.

The Death Note manga series was first serialized in the Japanese manga magazine Weekly Shōnen Jump published by Shueisha in December 2003. The series has since ended in Japan with a total of 108 chapters. Death Note was adapted into a series of live-action films in 2006. The films were directed by Shūsuke Kaneko, produced by Nippon Television, and distributed by Warner Bros. The Death Note anime, directed by Tetsurō Araki and animated by Madhouse, began airing in Japan on October 3, 2006, and finished its run on June 26, 2007, totaling 37 twenty-minute episodes.

I highly recommend Death Note to any fan of suspense or thought-provoking entertainment