In 2013, a 9.6 magnitude earthquake hit Los Angeles, and it separated from the U.S. mainland, becoming an island. American revolutionaries set up a rebel army on the island, and the U.S. president released all the criminals into this lawless place. However, the president's daughter was also kidnapped by the rebels, so the president asked Snake to sneak into the city, rescue his daughter and take back the key to unlock the nuclear bomb.