Format: 4K UHD Blu-ray. Title: The Sadness. They'd better find an answer soon, as the viral plague turns all it infects into brutally sadistic homicidal maniacs. The travails of Taipei lovers Jim (Berant Zhu) and Kat (Regina Lei) as they search for each other in a city descending into unspeakable chaos are chronicled in this explicit shocker.