On a romantic getaway to Iceland, a young American couple wake up one morning to discover every person on Earth has disappeared. Their struggle to survive and to reconcile the mysterious event lead them to reconsider everything they know about themselves and the world.

Based on the saga of Gísli Súrsson, one of the Icelandic Sagas. The attempt of a family head in 10th century Iceland to strengthen the fragile bonds within the clan through blood brotherhood turns into the opposite through suspicion and resentment. When the law of blood revenge has to be fulfilled after a murder, a fateful chain reaction is set in motion.