sentences:  In 2012, an alien criminal named Boris the Animal, a Boglodite, escapes from a maximum-security prison on the Moon to take revenge on Agent K, who shot off his left arm and captured him in 1969.He confronts K and 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.