Build a movie plot around this: Upon opening the coffin, what does Kau realize Yam's father is? Vampire
Answer:
Master Kau is a Taoist priest who performs magic that maintains control over spirits and irrepressible vampires. Together with his inept students, Man-choi and Chau-sang, he resides in a large house protected from the spiritual world with talismans and amulets.One day, he accepts an assignment from a wealthy businessman, Yam, to remove Yam's deceased father's grave and rebury it, with the hopes that doing so will bring more prosperity to the Yam family. Unfortunately, upon opening the coffin, Kau notices the body is still intact, even though it's been years since he died. Realizing that it is a vampire, Kau orders it to be moved to his house for further study and to be subject to spells that will prevent it from awakening. Kau deduces that Yam's father had died angry, and his last breath became stuck in his body for years, causing it to keep him "alive" and reducing it to a mindless state.Once in the house, Choi and Sang cover the coffin with enchanted ink to keep the vampire from escaping. However, they accidentally skip the bottom of the coffin, and the vampire breaks out two nights later and escapes the house, heading straight for Yam's home. It savagely kills Yam and goes into hiding when before morning.Wai, an incompetent police inspector who is smitten with Yam's daughter Ting, blames Kau for murdering Yam and arrests him. Kau is imprisoned in the local jailhouse and Yam's body is placed in a makeshift morgue nearby. Choi stays at Yam's house to protect Ting. Sang breaks in to free his master, only to witness Yam reawakening as a vampire. Kau and Sang engage it in battle and kills it. Wai realises his mistake in framing Kau earlier and accepts the fact that another vampire is on the loose.The vampire again invades Yam's house, forcing Choi and Ting to hide. Kau and Sang arrive in time to wound it in battle and forcing it to flee, but not before it attacks and critically wounds Choi. Kau invites Ting to stay at his house for safety. The next morning, after examining Choi's wounds, Kau claims he too...