Phantasy Star is set in the Algol star system which consists of three planets: the lush and green Palma, the arid and barren Motavia, and the icy and desolate Dezoris. Algol is ruled by King Lassic, who while originally benevolent, becomes a cruel, sociopathic tyrant. After a string of harsh political changes, small pockets of rebellion emerge but are mostly ineffective against Lassic's iron rule. One such rebel named Nero is killed by Lassic's forces, and his sister Alis swears revenge. Alis builds a party of adventurers including a warrior named Odin,[b] a wizard named Noah,[c] and a catlike creature named Myau. Together, they embark on an adventure spanning the three planets, meeting with townspeople, battling enemies, and finding special items that will help in the fight against Lassic. Eventually, the party engages and defeats Lassic, after which an ethereal voice tells them to return to Motavia. There, they encounter a more evil force, Dark Falz, and after destroying him, finally return peace to the Algol system.
