Qin Shuyi accidentally receives deadly warnings through a mirror: never open a red umbrella and do not return home before ten o’clock.She soon suffers terrifying incidents—red umbrellas that threaten her life and being followed late at night. She suspects her supervisor Zhou Yanshen is the culprit.The truth is Zhou Yanshen has an obsessive twin brother Zhou Yueyang, who repeatedly disguises himself as Yanshen to harm her out of twisted possessiveness.Zhou Yanshen secretly guards Qin Shuyi via mirror reflections and gets severely injured saving her. Zhou Yueyang is arrested by the police.After surviving life-threatening dangers, Qin Shuyi uncovers the truth behind the serial murders and the twin secret, regaining peace at last.