Thestorystartedinasecretlabthatfocusedongeneexperiments.Aresearcherranawayfromthelabwiththegeneofhydra,asnakewithnineheads.IntheprimitiveforestofMinglingMountain,shesuccessfullyproducedthehydra.TogettheNo.9growthhormone,shesetupatrapwiththescaleofthehydra.Unawareofthetruth,ProfessorChanandherfiancéwereluredandstuckinonetrapafteranother!