To save her comatose brother, Shi Ning enters a life-saving marriage with Shen Nanxun, only to discover his deadly betrayal. Desperate, she turns to his rival, Shen Lingchen, whose icy exterior hides a protective heart. As their battle of wits turns into unexpected love, Shi Ning must confront the impossible truth: her heart isn’t hers to give—it belongs to the mission of saving her brother.