John Carter smashed the power of the Therns, the evil priests who enslaved Mars for thousands of years with their false religion. But Matai Shang, the Holy Father of their order, has found the perfect way to strike back: through Carter’s beloved, Dejah Thoris. Shang has kidnapped the princess and is heading for a remote kingdom that still blindly clings to his discredited faith. Meanwhile, distressing evidence emerges of a conspiracy that threatens to break the fragile peace, plummeting the Red Martians against the savage Green hordes! Can Carter’s most steadfast ally, the mighty Tars Tarkas, overcome his own bestial urges and save the planet?