Zhong Chusi, a frail general, is forced by imperial decree to marry Li Rongyu, who has returned as a hostage prince. What begins as a coerced betrothal hides a secret bond fated to overturn destiny. He resents the marriage; she guards herself against it at every turn. Within the confines of the general's estate, they probe and check each other. But as imperial conspiracies stir and blood-kin betrayals close in, these two strangers are bound together and forced to stand side by side, breaking traps amid flashing blades. As the buried past surfaces, the secret in his chest and the obsession she carries unexpectedly intertwine. Where will this marriage, born of calculation, ultimately lead?