Yun Weishan infiltrates the mysterious and dangerous Gong Clan as a spy. As she carries out her mission, her fate becomes entangled with Gong Ziyu, who is in a difficult position. Amid suspicion and tests of trust, the two are drawn to each other, then protect one another through the whirlpool of family rivalries and hidden identities. As crises and schemes mount, they must choose between the fate laid out for them and their own feelings, seeking a chance to survive and discover their true selves on the edge of a blade.
