Thuvia is abducted and the only suspect is Carthoris, son of John Carter. Carthoris embarks upon a quest to the city of Lothar, only to discover that the city is inhabited with strange mental powers. Can love drive Carthoris to overcome the ghostly Bowmen of Lothar......Tara of Helium, daughter of The Warlord of Mars, is lost during a freak storm. Tara finds herself in the home to the Kaldanes, a race of brains with-out bodies. Tara, along with Gahan, escape from the Kaldanes then captured by the Chessmen of Mars, a hidden people in a far off city that is obsessed with an earth-like chess game called Jetan..