In 2012, an alien criminal named Boris the Animal, a Boglodite, escapes from a maximum-security prison on the Moon of Earth and arrives on Earth, bent on taking revenge on Agent K, who shot off his left arm and captured him in 1969. He confronts K, who is with his partner Agent J, and tells him he is "already dead". Back at MiB Headquarters, J peruses MiB's files and discovers K was responsible not only for capturing Boris, but for deploying the "ArcNet", a shield that prevented the Boglodites from conquering Earth, causing their extinction.