The drama's central narrative pivots on several major twists and turns across its 16-episode arc:
- The Core Deception Unravels (Ep. 9–10): Dal-mi uncovers the truth when comparing Ji-pyeong's handwriting to the childhood letters, triggering an emotional crisis where she questions whether Do-san's feelings were real or merely an orchestrated performance.
- The 2STO Acquisition Trap (Ep. 11–12): Samsan Tech wins Demo Day but falls victim to Alex Kwon's ruthless contract clauses. Ji-pyeong tries to stop the contract signing but arrives too late. The developers are contractually bound to work in Silicon Valley, while Dal-mi and Sa-ha are dismissed, forcing the emotional breakup of Dal-mi and Do-san.
- Three-Year Leap & Reconciliation (Ep. 13–15): Dal-mi joins Injae’s corporate venture as COO, scaling the NoonGil project globally. Upon the engineers' return from California, they re-form Cheongmyeong Company with Dal-mi and In-jae, pooling resources to create the Tarzan autonomous driving system.
- The Finale (Ep. 16): Dal-mi and Do-san successfully win the Seonju Smart City bid. Ji-pyeong steps forward as an authentic venture investor rather than a guilty protector. In-jae cuts off her adoptive family and reconciles with Grandma Choi, while Dal-mi and Do-san tie the knot, leading their company into a thriving future.