The history books tell us that young Prince Namor, the proud son of an Atlantean princess, joined the Allied fight against the Nazis in order to protect his undersea people. But what if Namor grew up on land with his human father, filled with hatred for the Atlanteans who killed his mother? For whom will he fight when World War II sweeps the planet and Atlantis calls for help? And in what terrifying ways might the course of history be changed forever?