Ordinary planner Lin Fei accidentally catches his "fragile" wife Su Wan subduing outlaws barehanded. As various factions close in one after another, shocking truths are peeled back layer by layer. The wife is the retired ace secret agent Phoenix, while the husband turns out to be an ultimate latent power holder sealed for years. Facing the hidden black hands attempting to shatter the peace, the couple fights side by side, exposes the conspiracy, shatters the crises to reclaim their own peaceful life, and vows to the death to protect each other's and the family's stable happiness.