Alone follows a writer seeking peace and solitude in the countryside in an attempt to recover from tragedy and finish her book. However, as the welcoming country house turns into a living hell, she soon realizes that her inner demons are not the worst of her problems.

黑暗骑士，具有超凡能力的正义之士，这个神秘组织暗中执行正义，将法律无法伸张的恶徒就地正法，向街头犯罪宣战。　　现代充满堕落、沈沦与腐败罪恶的城市，恐怖组织扬言释放致命的病毒毁灭人类，伊凡加入黑暗骑士组织，这才发现原来家族一直都是地下组织的领导人，而他的父母及组织里的其它组织成员遭受背叛，无一幸存，而人类最后的希望，就掌握在他手上…