The rain is strong and the wind is howling. In the blur of the storm, a shadow plunges from the top of an apartment building and hits the ground. The body of a woman lay twisted and broken next to the pool, her blood turning the pool's water ruby red. It is the sad end of another 'randomer'.As the world readily prepares to forget this dead woman, her sister Yuna discovers a lead the dead woman has purposely left for her to follow. The dead woman has left her diary where only Yuna will find it and inside, she described herself being threatened and blackmailed by what seemed like some powerful people. Nobody believed her, not even her husband or the police and that was the reason she killed herself. Yuna, swears to herself that she will not let her sister die in vain. Prepared to risk it all, she starts her own investigation following the one lead - to find a woman with a dragon tattoo around her wrist.Yuna has no idea that she is treading dangerous waters. Will she be able to risk it all, even her life to bring justice to her sister's death?At the same time, in another country, a Japanese woman named Ada is under fire for loosing her randomer, her chess unit for a much bigger crime. She now needs to find a replacement as soon as possible for her randomer or the whole master plan will be affected. Fighting for her appraisal, she is determined to do better this time and has decided on her pick of the unlucky guy to be her next randomer.On the other side of the globe, Zach and his wife receives the best news of their lives - free return tickets for a holiday of a lifetime. As they hastily and happily board the plane, neither of them know this trip will be a living nightmare. Zach unknowingly steps into his lead to play randomer and the orchestration of an intrinsically planned crime continues.As Yuna digs deeper into the secret of the underground syndicate, Ada is forced to execute her plans faster and a killer is sent to hunt Yuna down. Who will win in this battle of the wits and courage? Can Yuna bring this syndicate to light? Or will Ada be able to kill this woman who is determined to ruin her career?