Traveling from space, three pirate ships make their way towards Earth. When Captain Sinbad and his Space Pirate crew reach Earth they start stealing treasures from South America. After receiving a message on the Justice League TroubAlert, Superman and Wonder Woman confronts Captain Sinbad and his Space Pirate crew. Captain Sinbad then hurls city buildings toward a mountain range allowing the pirates to escape the two Super Friends. The Super Friends regroup to strategize and later streak off to confront the Space Pirates. While trying to stop a Space Pirate boat, Wonder Woman gets hit with a stun laser and taken captive aboard one of the ships. Meanwhile, at the Hall of Justice, the JLA satellite monitor picked up Wonder Woman, causing Zan to convince Jana to go after her. When Zan and Jana find Wonder Woman, they get trapped by the Space Pirates and a mind-controlled Wonder Woman and are made Sinbad's slaves. Wonder Woman then sends a warning to the other Super Friends to leave the Space Pirates alone or they may never see the Wonder Twins again. Superman then disguises himself as Clark Kent to enter the Space Pirates' ship and rescue Wonder Woman and the Wonder Twins. 
NOTE: This episode and The World's Greatest Super Friends episode "Space Knights of Camelon" are the only episodes of the Super Friends series where Wonder Woman's golden lasso involves truth-compelling power.

Traveling from a distant corner of the universe, a fleet of unidentified ships head towards Earth to hypnotize all children and gather them to Monument Valley, Arizona. The Super Friends start to take action after the Wonder Twins became hypnotized and a call from the Justice League TroubAlert. After the Super Friends tried to stop the children from entering a spaceship, a UFO arose to destroy a nearby city. Batman and Robin stayed with the children as Superman and Wonder Woman stopped the UFO and the disasters it caused, only to get trapped inside the space craft as it heads to the Anti-Matter Universe. Meanwhile, at the Hall of Justice, the Wonder Twins escape by using hypnotic mind control on Aquaman to release themselves. Batman and Robin arrive back at the Hall of Justice to stop a nearby power source overload and snap Aquaman out of a mindless slumber. The Super Friends must now rescue the cargo of children and the Wonder Twins from slavery by an evil genius from the planet Nofan and bring them safely home to Earth.