Murong Wanqing is famous as a "fragile porcelain" in the capital. After the Murong family was wiped out, everyone was waiting to see how this delicate daughter-in-law would perish in the monstrous fire. Good news: She survived, with half a sheet of piano music and a box full of enemy lists. The bad news: She's penniless and has to evade repeated raids by her enemies. In order to survive, she had to remain anonymous and work as a musical instrument player in a restaurant. Enemy: "The girl who plays the piano looks a bit like the dead legitimate daughter of the Murong family." Murong Wanqing lowered her eyes and coughed weakly: "My lord, you are just kidding me, a common girl is just a poor person who relies on her crafts to make a living." Late at night, she replaced the piano strings with poisoned silver wire, and set up a dragnet on the enemy's only path. There is no system, no plug-ins, all she has is the piano skills that she has practiced day after day until her finger bones are deformed, and a heart that is colder than ice. When their enemies' properties collapsed one after another and their members died in "accidents" one by one, they finally panicked. "The sound of the piano... Why does it sound so much like the murderous music of the Murong family?" Murong Wanqing stood on a high building, lifting her fingertips lightly. In the wind and snow, she smiled brightly and cruelly: "Everyone, this piece of music is a funeral prelude that I specially composed for you." This is a story about dormancy and counter-killing. Everyone knows that she is weak and can be bullied, but they don't know that she is the black panther who is best at hiding her claws.