Parasite Frenzy / Island of the Dead

Wanqu Island is overrun by deep-sea parasites that turn the infected into bloodthirsty demons. Hoping to make his name, naval officer Nie Yunqiao leads a squad of condemned convicts ashore to rescue the Marquis of Nan'an — and there encounters Han Chong, the father who long ago vanished under an assumed name. The island is a death trap and every man in the party has his own agenda. As betrayals and sacrifices mount, the truth emerges: the plague of demons is a cruel experiment devised by a court eunuch and the Marquis himself. Father and son set aside old grievances and join Aru, a healer's daughter, against the conspiracy. After a brutal battle the culprits are brought to justice, and Aru turns to her father's notebooks in search of a cure.