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Mercury is a quirky, unpredictable, and a violent vigilante who seeks to bring justice upon a variety of low-life scum in the city. However, she used to be a normal person with a normal life, a smart young woman with ambitions. One night changed it all. A traumatic experience sent her mind tumbling down into a spiral of madness. Haunted by nightmares and struggling to trust others, Mercury saw a new meaning in her life.

Driven by her newfound purpose, Mercury took to the streets to punish those who are responsible for what happened to her, so that an experience like this won’t happen to anyone else. However, before long, she finds herself entangled in something much bigger than her own sense of revenge. She soon discovers that petty criminals are only a tip of the iceberg and that the city contains individuals who are far worse. In order to bring down the enemy, she will have to find potential allies, make hard decisions, manipulate others when necessary, and use unhinged violence in order to keep herself safe through all this.