Previously, the heroes split into two groups, the first to sabotage the chupacabra temperature controls in the Sweet Heart underground base, and the second to poison the incubator water supply.
The temperature control team triggers a lockdown, and, responding to the blaring alarm, Jackson leads them to an alternate exit in the old missile silo. Meanwhile, the water supply team hears the alarm, but, unaware of the lockdown, they head for the main entrance. The teams are relieved to see each other when they arrive at the primary corridor, but their relief is short-lived, as a pack of chupacabra bursts into the long corridor between them. Mariana roasts several chupacabras with the Zippo Lighter from Hell, and Ryo slices several others to pieces with his flashing katana. The hacking team doesn’t fare as well, and the chupacabra pack leader rakes Matt with its claws. Paul, the small chupacabra he befriended while spying on the base, leaps over Matt and tries to claw the pack leader, but is easily swatted aside. Marco crushes monster skulls with a baseball bat, and Matt blasts the chupacabra leader and its remaining followers with his shotgun, as Jackson quickly performs first aid on Paul. Limping through the missile silo toward the alternate exit, the heroes find themselves in a vast warehouse of incubation pods, thousands of them, that will not hatch, thanks to their efforts. Back at the campsite, Jackson advises his friends to keep a low profile while they map out ley lines to figure out the exact location of the Convergence.
The following day, CP and Matt analyze Troy’s data to determine that the Convergence might just happen in the Raven’s Nest stadium during graduation. With Walpurgis Night approaching, the heroes clean and stow their weapons before turning in for the night.
At 2AM, CP’s cell phone rings. The panicked unknown caller is ringing from the local cemetery, his voice straining over strange shuffling and groaning sounds in the background. Flexing his hacking skills, CP determines that the caller is Professor Cutter, previously a target of voodoo priestess Kevya Bordeaux. The students head for the cemetery, loaded for bear. The professor is standing in the middle of the cemetery, beckoning them closer. As they approach, Professor Cutter’s skin sloughs off to reveal a hideous demonic form. Zombies and skeletons rise from the earth and attack, sending Troy running off in a panic. Troy narrowly escapes the gnashing teeth and slashing claws and manages to shoot a zombie in the head with his wrist rocket. Mariana and CP light up their Zippos, Ryo draws his sword, and Marco his bat. Matt, too close to the attackers to use his shotgun effectively, wields it as a club.
The students quickly tear most of the zombies to pieces, but the demon shrugs off the attacks and lurches at Ryo. Ryo and the demon battle, sword versus claws, neither able to penetrate the other’s defenses. A skeleton rips Matt’s torso to shreds, but Mariana sets the skeleton on fire with her Zippo Lighter from Hell. As Ryo slashes the demon across the chest, Marco falls back with a bleeding arm, and CP burns Cutter with his Zippo, incinerating him. As the demon falls, the undead crumble to dust around them. The heroes whisk Matt to the hospital, telling the ER staff he was injured by a mountain lion. With Walpurgis Night one day away, the seniors wonder: What will happen next?