![Captive](https://image.tmdb.org/t/p/w185/az9yxqEmHLFKuaLuDXcpm6lJ4pB.jpg)
When vengeful General Francis X. Hummel seizes control of Alcatraz Island and threatens to launch missiles loaded with deadly chemical weapons into San Francisco, only a young FBI chemical weapons expert and notorious Federal prisoner have the stills to penetrate the impregnable island fortress and take him down.