Dr. Pelagian is an ecological fanatic who can communicate with animals. Pelagian is attempting to force three powerful industrialists to stop polluting the planet. He threatens them with natural disasters if they fail to comply. When the SuperFriends try to reason with the industrialists they refuse to change their minds. The SuperFriends are forced to find Dr. Pelagian and stop him before he can make good on his threats.
Wendy and Marvin see an albatross that gives a warning from Dr. Pelagian, and a demonstration of his power - a temporary tidal wave - while at a seaside carnival. The Super Friends get reports of Dr. Pelagian, and a demonstration of his power - a temporary tidal wave - while at a seaside carnival. The Super Friends get reports of Dr. Pelagian's warnings to stop polluting the seas from other places. Col. Wilcox reports industrialists have already agreed to take action, but three industrialists are holding out. The three refuse to change, despite being asked by the heroes, Wendy and Marvin, and being again warned by Dr. Pelagian. Aquaman confirms who Dr. Pelagian is, while Wendy and Marvin return to the carnival to track him. Wendy and Marvin finally meet him, and go on his sub. When they learn he plans to destroy the holdout's factories with tidal waves, they send Wonder Dog to warn the Super Friends. The heroes manage to save the factories, and then Superman and Aquaman manage to locate the sub. The three finaciers finally agree to help stop polluting, while Dr. Pelagian understands his actions are wrong.