this is a story about a cold , savage and heartless girl who only knows how to love her mother.she has a big secrete and bad past which no one knows .but everything will change when her mother fall's in love with the greatest mafia leader mr. kim who have seven badboy as his sons. but the question is what will happen when her big secret will reveal? will bts except her as their stepsister or will she except them as her stepbrothers ?what will happen. note: there is no romance between y/n and bts .their is sibling love.