Pioneer is set in the early '80s at the beginning of the Norwegian Oil Boom. Enormous oil and gas deposits are discovered in the North Sea and the authorities aim to bring the oil ashore through a pipeline from depths of 500 meters. A professional diver Petter obsessed with reaching the bottom of the Norwegian Sea has the discipline strength and courage to take on the world's most dangerous mission. But a sudden tragic accident changes everything. Petter is sent on a perilous journey where he loses sight of who's pulling the strings. Gradually he realizes that he is in way over his head and that his life is at stake.