The human tribe places a strange necklace on Melosa, drawing Si'i towards the village. K'tahsh and her Yin-tos men wait for him, ready for tranquilization. However, K'tahsh wants Si'i to have Mel as the main course. Just then, Rion bursts in, and frees Mel. They place the necklace on the tribe's chief who is grabbed by Si'i and turned into energy for him to swallow. K'tahsh's men then subdue the human-guardian hybrid and has the entire tribe massacred. Meanwhile, Seth, Erik and Adam have just arrived back at the dojo from their Amphibigor mission, with Kara once again asking for the key to the Tomb of Al-Mortigar. After telling her off, Seth goes to her room and goes into a conversation with Kara. However, he notices in an ultimate mirror that she has no reflection. He later traps her in a forcefield and demands she reveals who she really is. "Kara" is actually the shapeshifter Kali who breaks out. Barely getting away, Seth tells Adam and Erik to get the Orb of Ogama-Yan while he tracked Kali. But things get complicated when Adam and Erik meet two Seths in the orb room. To determine which one was the real one, Erik asks them what they go to Arboth to get when Seth merged with Kragus. The one carrying the orb says pure di-gata ore but the other says the Megalith separated him and Kragus. And so, the Seth with the orb changes into a hideous shape and goes into the vents. Outside, Mel and Rion are just returning when the dojo's defenses start shooting at them; Seth had implemented a lockdown. Erik is tricked by Kali (as Adam) into revealing the shutdown codes, his old locker combo and Seth reveals where the key to the Tome is. Kali gets by Mel and Rion and has contacted her superiors. Brackus has also come to have their agreement fulfilled. But instead of giving him the orb, Kali starts to strangle him just as Si'i comes in. Worse, she had set the dojo to self-destruct. Rion and Seth begin a descent into the core but accidentally set off a trap, releasing slugs that ex