
Three years after her sister’s mysterious death, healing-mermaid princess Lanxi returns to the royal court disguised as a silver-tailed singer. Her target is Feili, the ruthless Red Pearl princess about to marry Crown Prince Cangyao—the man who abandoned Lanxi’s sister when she needed him most. Using a forbidden love song, Lanxi drives a wedge between the royal couple and uncovers a hidden chamber where hundreds of mermaids have had their voices stolen to power the kingdom. But the deeper she digs, the uglier the truth becomes: Feili built the torture system, while Cangyao protected the crown instead of exposing it. At the royal wedding ritual, Lanxi reveals her true identity and turns the bride’s crown into a public trial. To save the Seven Seas from a devastating black tide, she sacrifices her own voice—then rejects the throne and builds a sanctuary where the voiceless can reclaim their lives.