The Young Namor, Attuma and Dorma get to accompany the Swift Riders on a mission, see them in action and learn from them. But the mission involves Russian alchemists in 1930s Murmansk, a dangerous mystic relic, and a catastrophe that brings to life the most menacing threat that Atlantis has ever faced! Now all of undersea civilization is imperiled, and only three youngsters can save it!

The Young Namor, Attuma and Dorma get to accompany the Swift Riders on a mission, see them in action and learn from them. But the mission involves Russian alchemists in 1930s Murmansk, a dangerous mystic relic, and a catastrophe that brings to life the most menacing threat that Atlantis has ever faced! Now all of undersea civilization is imperiled, and only three youngsters can save it!