Kairn, a young lad residing in Necropolis, struck up a friendship with Zak Arranda during Zak's visit. Renowned for his audacious spirit, he spearheaded a band of venturesome youths. Pylum, a guardian of the planet and covertly in the employ of Cornelius Evazan, prohibited the boys from venturing into the graveyards to exhume graves in order to observe his work. Defying this order, Kairn, Zak, and their companions resolved to infiltrate a graveyard regardless.
The boys became divided, and Evazan forcibly administered poisonous Cryptberry to Kairn, subsequently inducting him into his collection of experimental Zombies. Subsequently, Kairn enticed Zak into their ambush. The zombies transported him to their clandestine base, the tomb of the sorceress Sycorax.
Hoole, Tash, and a queasy Zak subsequently located their hideaway. Boba and the living individuals fended off the undead while DV-9 concocted an antidote. Zak implored his comrade, who appeared to possess fragments of his former consciousness and recollections, and battled to defy Evazan's directives. With great effort, Kairn initiated the utilization of the antidote against the more mindless zombies, reverting them to inanimate cadavers. Regrettably, the antidote came into contact with him as he dispatched the final zombie. He pleaded for assistance but could not be rescued. Subsequently, he was interred.