Contains spoilers for this episode and earlier episodes.
The reporter sent to embarrass Cheongmyeong finds that Dal-mi and Do-san have investigated the ransomware attack. Evidence points to the twin developers now working for Morning Group, and the team has taken it to the police. Dal-mi turns the interview toward the attack's perpetrators, preventing the planned story from undermining their bid. Ji-pyeong arrives ready to help and discovers that the company has already found a way to defend itself.
As the team prepares for the next stage, Dal-mi presses for investment to expand Cheongmyeong. In-jae initially worries about losing control but later supports the plan. She ends her legal connection to Chairman Won and returns to Won-deok as Seo In-jae, apologizing for the years apart. Their reunion brings the sisters and their grandmother together again. Ji-pyeong also finds a personal purpose in supporting a business that helps young people leaving orphanages become independent.
Ji-pyeong tells Dal-mi she owes him nothing and admits that her letters comforted him too. Asked to invest in Cheongmyeong, he and Do-san discuss the opportunity as business partners and agree to move forward. Dal-mi presents the company's bid, with Do-san supporting her from the audience. The closing jump to 2020 shows their marriage and Cheongmyeong's success. Dal-mi serves as chief executive and Do-san as chief technology officer; they leave for a shareholders' meeting alongside In-jae and Ji-pyeong.