In the 1970s, Taiwan's first grand cabaret, The Sapphire, opened in Kaohsiung, igniting a golden decade of live entertainment. Beneath its dazzling lights, the nation's tensions and censorship faded in nights of glitz and song.Stars like Teresa Teng, Fei Yu-ching and Fong Fei-fei graced. its stage, where glamour met gambling, drugs, and danger.Half a century later, The Sapphire is resurrected—through AI and music—to relive its untamed brilliance.

In 2006, Detective Chang leads a police investigation into a murder committed in a public marketplace. Chang discovers the victim's father has ties to several other families with dead or missing members, and a grim espionage case buried for 50 years in Taiwan's past. Meanwhile, the kidnapped Mr. Hsu is interrogated by a mysterious mastermind. As the truth emerges, the embers of history become a deadly wildfire.