Long ago, the Viking warrior Mog has a wife Nin (a woman with one green eye and one brown eye) and three sons: Gilad, Ivar and Aram. Mog discovers a special herb he believes is connected to the gods. Calling it the Bloom, Mog shares it with their young sons, who begin growing rapidly and show increased physical abilities. Consuming the plant regularly, Mog gains a form of immortality and begins to hear voices he thinks are gods telling him it is his destiny to dominate Earth. When Nin shows concern for him, Mog decides she is jealous of his power and stabs her fatally. To save his mother, Ivar pushes her into the river where the Bloom plant was found. Mog destroys his village in a rage, then continues pursuing murder and conquest over the centuries. Eventually, he gains enough control over his rage to act clandestinely when he must. Nin, transformed by the Bloom, repeatedly confronts Mog, becoming his Immortal Enemy.