▁son , ▁and ▁some ▁students ▁remain . ▁The ▁mother ▁dies ▁when ▁a ▁ti yan ak ▁bit es ▁her ▁while ▁def ending ▁her ▁son . ▁The ▁students ▁kill ▁two ▁of ▁the ▁ti yan aks ▁with ▁holy ▁re lic s ▁but ▁fall ▁short ▁when ▁dispatch ing ▁the ▁last ▁of ▁them . ▁The ▁professor ▁has ▁the ▁idea ▁of ▁bapt izing ▁the ▁ti yan aks ▁by ▁subm ers ing ▁them ▁on ▁the ▁pool , ▁killing ▁the ▁last ▁one ▁with ▁this ▁method . ▁▁ ▁Many ▁days ▁later , ▁the ▁surv iv ors ▁have ▁a ▁party ▁when ▁She ila ▁checks ▁on ▁Bib oy ▁who ▁contract ed ▁a ▁fe ver . ▁When ▁they ▁try ▁to ▁find ▁out ▁what ▁happened , ▁the ▁boy ' s ▁eyes ▁become ▁fier y ▁and ▁en rag ed , ▁and ▁his ▁head ▁becomes ▁eng ulf ed ▁in ▁fl ames , ▁reve aling ▁himself ▁as ▁a ▁ti yan ak . ▁ ▁Cast ▁ ▁Rica ▁Per ale jo ▁as ▁She ila ▁Jen ny lyn ▁Mer c ado ▁as ▁R ina ▁Mark ▁Her ras ▁as ▁Christian ▁J C ▁De ▁V era ▁as ▁Ker win ▁Lot lot ▁De ▁Leon ▁as ▁M ild red ▁T J ▁Tr in idad ▁as ▁Professor ▁Earl ▁Nash ▁Agu as ▁as ▁Bib oy ▁K arel ▁Mar quez ▁as ▁C ind y ▁Ryan ▁Y ll ana ▁as ▁P J ▁J ill ▁Y ulo ▁as ▁H anz ▁Al w yn ▁U y ting co ▁as ▁Bry an ▁And rei ▁Felix ▁as ▁R ex ▁Tom ▁Oliv ar ▁as ▁Mang ▁Gast on ▁Alc ris ▁Gal ura ▁as ▁Gas oline ▁Boy