The death note is a notebook used by shinigami to kill people. Its rules are as follows;
1. The human whose name is written in the note shall die.
2. The note will not take effect unless the writer has the person's face in their mind when writing his/her name. Therefore, people sharing the same name will not be affected.
3. If the cause of death is written within 40 seconds of writing the person's name, it will happen.
4. If the cause of death is not specified, the person will simply die of a heart attack.
5. After writing the cause of death, details of the death should be written in the next 6 minutes and 40 seconds.
6. The note shall become the property of the human world, once it touches the ground of (arrives in) the human world.
7. The owner of the note can recognize the image and voice of its original owner, i.e. a god of death.
8. The human who uses this note can neither go to Heaven nor Hell.
9. If the time of death is written within 40 seconds after writing the cause of death as a heart attack, the time of death can be manipulated, and the time can go into effect within 40 seconds after writing the name.
10. The human who touches the Death Note can recognize the image and voice of its original owner, a god of death, even if the human is not the owner of the note.
11. The person in possession of the Death Note is possessed by a god of death, its original owner, until they die.
12. If a human uses the note, a god of death usually appears in front of him/her within 39 days after he/she uses the note.
13. Gods of death, the original owners of the Death Note, do not do, in principle, anything which will help or prevent the deaths in the note.
14. A god of death has no obligation to completely explain how to use the note or rules which will apply to the human who owns it.
15. A god of death can extend his life by putting human names on the note, but humans cannot.
16. A person can shorten his or her own life by using the note.
17. The human who becomes the owner of the Death Note can, in exchange of half of his/her remaining life, yet the eyeballs of the god of death which will enable him/her to see a human's name and remaining lifetime when looking through them.
18. A god of death cannot be killed even if stabbed in his heart with a knife or shot in the head with a gun. However, there are ways to kill a god of death, which are not generally known to the gods of death.
19. The conditions for death will not be realized unless it is physically possible for that human or it is reasonably assumed to be carried out by that human.
20. The specific scope of the condition for death is not known to the gods of death, either. So, you must examine and find out.
21. One page taken from the Death Note, or even a fragment of the page, contains the full effects of the note.
22. The instrument to write with can be anything, ( e.g. cosmetics, blood, etc.) as long as it can write directly onto the note and remains as legible letters.
23. Even the original owners of the Death Note, gods of death, do not know much about the note.
24. You may also write the cause and/or details of death prior to filling in the name of the individuals. Be sure to insert the name in front of the written cause of death. You have about 19 days (according to the human calender0 in order to fill in a name.
25. Even if you do not actually possess the Death Note, the effect will be the same if you can recognize the person and his/her name to place in the blank.
26. The Death Note will not affect those under 780 days old.
27. The Death Note will be rendered useless if the victim's name is misspelled four times.
28. "Suicide" is a valid cause of death. Basically, all humans are thought to possess the possibility to commit suicide, it is, therefore, not something "unbelievable to think of".
29. Whether the cause of the individual's death is either a suicide or accident, if the death leads to the death of more than the intended, the person will simply die of a heart attack. This is to ensure that other lives are not influenced.
One day the shinigami named Ryuk decides to drop his death note to the human world out of boredom. A genius high school senior by the name of Light Yagami finds it and decides to give it a try. To his surprise he finds that it works. Light begins to start punishing criminals in massive numbers, and eventually draws the attention of world governments. They bring in a genius detective that only goes by the name of “L” who begins to narrow down the possibilities of who it is that is killing criminals. At the same time internet forums begin talking about a person named Kira who is killing people off, and start showing their support for him. Light eventually is put in the crosshairs of L when an FBI agent assigned to investigate all those related to the case, dies. L introduces himself to Light at a college entrance ceremony and asks Light to help him with the case. This entire anime is a massive amount of mind fucks between Light and L. Each of them showing their massive intelligence and manipulative skills. I personally think that everybody should watch this show. It has an incredible cult following. People have even used this series as a premise for real world killings and death threats by creating a notebook that has the title Death Note, and including the same rules written inside as the anime. There have also been live action movies for this anime which use the same voice actors to make it seem more familiar to the anime followers. WATCH IT! And Enjoy!