"Night Talk to Your Heart", the show hosted by psychological counselor He Dun and renowned radio host Qian Kaiyi was planning an event with the theme "Sweethearts in the Past". When looking for stories, they received letters from many listeners and a story about An Na attracted their attention. Since the story was suspicious, He Dun and Qian Kaiyi started to investigate it following the clues. During the investigation, He Dun finally learned her background - she was Xiaokele, An Na's daughter.