In the far future, freedom fighter Roj Blake, framed by the all-powerful but corrupt Galactic Federation, escapes his captors from his sentence to a harsh penal colony and, helped by a handful of fellow convicts and armed with a superbly-equipped alien spaceship, sets about restoring freedom to the galaxy.

Supreme Commander Servalan assigns the task to the deadly Travis-his orders simply to seek, locate and destroy Blake's 7! Travis and his Mutoid crew clash with Blake in a crucial struggle over the Federation's secret cypher machine and again in desperate hand-to-hand combat on a mysterious dead planet. Finally, they confront each other on a barren ice world as Blake attempts to rescue the resistance leader, Avalon. This time, however, Travis is expecting him, and a terrible trap awaits. . .

A spaceship crashes approaching the planet Cephlon and when the crew of the Liberator answer the distress call they find their own lives endangered. Blake is caught in a desperate race against time to save the lives of the crew and also find the mysterious ORAC. Once in Blake's possession, ORAC predicts the future of Blake and his crew by showing them an image of the Liberator blown to atoms in space. Blake is powerless to alter their inevitable destruction, and when the Liberator is seized by a hostile force, a series of terrifying events sets the prophecy in motion.