Adam, Orko, and Snout Sprout have come from Eternia to witness Etheria's Day of the Flowers, a celebration of the planet's beauty. The same day, Hordak forms an alliance with the Monstroids in an effort to capture more slaves (he's lost many in the Rebellion's raids). Six powerful Monstroid machines close in on the free Etherians' celebration. Unfortunately, one of Orko's spell mishaps has caused the Swords of Power and Protection to disappear! Adam and Adora have no choice but to fend off the Monstroids without the powers of their alter egos. Snout Sprout, Frosta, Madame Razz and Broom help out all they can, but the Monstroids keep coming. Can Orko find the lost swords in time?