It follows Becca, a forensics expert who, when investigating a murder, realizes that the body of the victim looks exactly like her.。镇国将军嫡女徐楚韵因青梅竹马的副将孟琦为救自己而死，从此封心锁爱时至徐家发生危机，徐楚韵为了保全徐家自愿入京等待皇帝赐婚。执棋之人，身亦在局中，赤子之心，何以藏算谋?在东宫各自谋划着自己的未来。。