Ruan Xiaoman, a cold-storage warehouse porter, has spent seven years hauling cargo at a freezing dock in temperatures of minus eighteen degrees, honing an extraordinary memory. A childhood nursery rhyme leads Song Lingyi, chairwoman of the Song Group, to recognize her as the biological daughter she lost many years ago. Faced with a series of schemes and accusations orchestrated by her fake heiress counterpart and her own relatives, Xiaoman refuses to play the victim. Armed with the account books and clues preserved in her remarkable memory, she gradually exposes the conspiracy behind the identity swap, clears her name, and tears through layers of lies, ultimately reclaiming her true identity and the family love that rightfully belongs to her.