In a bustling city, a girl who delivers express delivery lives an ordinary life, but her fate suddenly changes due to a mysterious rough stone. A group of mysterious figures are eyeing the rough stones out of greed. The protagonist is struggling in this stone gambling controversy due to lack of strength and experience. The mysterious figures have set up many scams, causing the protagonist to fall into many misunderstandings. They are pressing harder and harder, leaving little time for the protagonist to reveal the secret of the rough stone. The protagonist not only has to deal with the dilemma of lacking experience in stone gambling, but also struggles to survive in a dangerous environment created by mysterious figures. Even if the secret of the rough stone may eventually be revealed, the sacrifices along the way will make the victory bitter. Whether she can break through the predicament, protect the original stone and uncover the secret behind it is unknown.
