50 years in the future, the Sun begins to die, and Earth is dying as a result. Though the encroaching darkness at first seems unstoppable, scientists have devised one desperate final plan to buy the human race a temporary reprieve from the grim future that looms just past the horizon. A crew of eight men and women has been given a nuclear device designed to reignite the sun and are sent hurtling through the cosmos on the most crucial space mission ever attempted. Suddenly, as the crew loses radio contact with mission control, everything begins to fall apart. Now, in the farthest reaches of the galaxy, the men and women who may hold the key to ultimate survival find themselves struggling for their lives and their sanity.