Orko's magic pyramid inadvertently saves Dree Elle, a female Trollan (Orko's species), who was hiding from Dragoon, an evil fire-breathing half man, half dragon who is terrorising Orko's home word of Trolla. On hearing the threat to his world, where he is a great magician, Orko promptly returns with Dree Elle in the pyramid. Knowing that their friend will need some help, He-Man and Battle Cat get The Sorceress to open a portal to send them to Trolla to help their friend, and find themselves in Orko's bizarre, back-to-front world, where they must put an end to Dragoon's reign of terror before sundown, or the portal back to Eternia will close...

An inventor called Zicran visits the Royal Palace to deliver a Transmutator machine to Man-At-Arms, accompanied by his daughter Ileena, a friend of Teela's. Ileena is vulnerable and lacking in self-confidence, feeling inferior compared to Teela's agility.

Meanwhile, an evil sorcerer called Jarvan, who was previously defeated by He-Man and Man-At-Arms, has escaped from the prison mines and has set his sights on the Transmutator. Preying on Ileena's depression, he disguises himself as a kindly old woman and gives Ileena a 'magic potion' that will boost her confidence and strength. But the potion contains a dangerous drug, and Ileena soon finds herself addicted to the drug, and almost causes several serious accidents while under its effects. She also finds herself unwittingly obeying Jarvan's commands, and helps him to obtain the Transmutator! Can the heroic warriors cure Ileena's addiction before she causes more damage to herself and the people around her?

Adam, Teela and Cringer are exploring the Valley of Power, which contains magical water which imbues anyone who drinks it with great power. But a stranger called Danavas is also in the area, and has stolen the egg of a Mother Rogue. When the baby bird hatches, he makes it drink the water and gain its power, so he can control it for himself. The bird grows to giant size, and soon the Royal Palace is in danger from Danavas' adopted pet!

Negator, an evil character with a love of computers and electronics, sees Man-At-Arms testing out his latest invention, the Beam Ray, in the desert. Impressed, Negator wants the scientist to come and work for him, so that he can use his creations for his own evil purposes. When Man-At-Arms refuses, Negator captures Teela to force him to come to him. As He-Man, Ram Man and Battle Cat search for their missing friends, they are sucked into Negator's underground electronic domain, and Negator sends He-Man and Ram Man into his living electronic "game"...

A villain called Azrog is arrested on Trolla by Uncle Montork, but he flees to Eternia where he joins forces with the witch Spydra. Montork follows him, but ends up imprisoned in Spydra's castle. When He-Man, Battle Cat, Teela and Orko go to rescue Montork, Orko falls under Azrog's spell and becomes evil, and is set against his friends.

Evil-Lyn captures Mira, the daughter of the powerful wizard Kor, and frames He-Man and Man-At-Arms for the capture. Kor takes He-Man and Man-At-Arms prisoner, and refuses to listen to their pleas for innocence, planning to unleash a demonic entity called the Crimson Scourge upon them unless they reveal his daughter's whereabouts.

Queen Sybilline, apparently once one of the most evil sorceresses in Eternia, has defected to the side of good. She enlists the help of He-Man and his companions in restoring King Danton of the Isle of Tears to the throne, having helped the evil Gorgon to overthrow him. But will they succeed, when Gorgon has recruited Evil-Lyn as his replacement sorceress?

Darkdream, an evil being who can control people's dreams, has been freed from the seal in which he was imprisoned, and is now using his powers to once again give the people of Eternia terrible nightmares. With his allies Evil-Lyn and evil magician Trebor, Darkdream plans to bring eternal darkness to Eternia so he can roam it freely and bring it his reign of terror once again...

A strange little creature called Montiek, a former member of the Council of Evil with Skeletor, turns up at Snake Mountain with some warriors he found on ancient Earth. He is travelling the universe recruiting powerful warriors for his Castle of Heroes, so he can use them as slaves. He has come to Eternia in the hope of capturing He-Man for the Castle of Heroes, and sets up a series of tests which He-Man must pass before he can be recruited. Skeletor is hoping that He-Man will pass the tests, so he can be rid of him- but he knows that He-Man won't be as easy to capture as Montiek thinks.....

A spacefaring gladiator called the Game Master lands on Eternia, intending to capture He-Man to make him fight for his amusement. But when he sends his minions out to find He-Man, he is in the form of Adam and so He-Man is nowhere to be found. So instead they capture Teela- but they also take Adam's Power Sword, meaning he is faced with the task of rescuing Teela as Adam!

The Sorceress sends He-Man to the Sands of Time, to investigate the mystery surrounding a pyramid which appeared out of nowhere, then vanished as mysteriously as it appeared. When he reaches the desert, accompanied by Ram Man and Orko, He-Man comes across a villain called Lord Masque, who is causing havoc in the desert whilst intending to uncover the house of his 'mistress'. He-Man consults the Royal Archaeologist, Melaktha, who tells him that there was once a dark fortress in the desert which was home to the evil Goddess Shokoti. Suspecting this is the fortress that Masque intends to uncover, Melaktha and his young assistant Stanlin accompany the heroes to the desert to investigate Masque's scheme further.

Now that the House of Shokoti has been risen from the Sands, and Lord Masque has been defeated, the heroes retire to bed for the night, planning to investigate the temple in the morning. But Stanlin, whom Melaktha has refused permission to join the expedition, is determined to see inside the temple for himself, and forces Ram Man (who has been put on night guard) to ram down the temple's door for him. Ram Man gives in to his wishes, but is knocked unconscious by the force of the blow, and Stanlin soon finds himself a helpless prisoner of Shokoti herself.....