Rayven Choi tells the story of a young woman who, as a child, witnesses a hitman murder her parents on a military commuter train. She is the sole survivor on the train and is quietly sent to Seoul, Korea where she is adopted by her father's KATUSA. Rayven spends twenty years in Korea before discovering a clue that her father left behind that could lead her to find the killer. She returns to America and seeks help from the FBI, but soon realizes that they may also have blood on their hands.