Episode 1 | Start-Up

The spring Seo Dal Mi lost everything, Nam Do San's letters kept her company. Fifteen years later, she needs him by her side to prove Won In Jae wrong.

Episode 2 | F F F (Family, Friends, Fools)

To preserve Dal Mi's past and to support her future, Choi Won Deok asks Han Ji Pyung to pull off an impossible task.

Episode 3 | Angel

Ji Pyung scrambles to transform Do San into the man of Dal Mi's dreams. A rude awakening prompts In Jae to close one door and open another.

Episode 4 | Sandbox

Despite differing pasts, Dal Mi and In Jae fight for their dreams at the same starting line. Ji Pyung sets out to protect Dal Mi and help Do San.

Episode 5 | Hackathon

Dal Mi and In Jae present their teams' ideas on the Hackathon stage. A story about Dal Mi's upbringing moves Ji Pyung to fight for her success.

Episode 6 | Key Man

In Jae uses lessons from her father and stepfather to her advantage. A clash over company shares tests Dal Mi, who turns to Ji Pyung for advice.

Episode 7 | Burn Rate

Grappling with his feelings for Dal Mi, Ji Pyung avoids her. Do San's knowledge of Won Deok's condition inspires a business idea for Samsan Tech.

Episode 8 | Backup

Devastating news gives Dal Mi another reason to make the app a success. Won Doo Jung's plan to teach Do San and Dal Mi a lesson backfires.

Episode 9 | Risk

Do San and Ji Pyung struggle to bear the weight of their untold truths. Doubts and a mix-up lead Dal Mi to the place where it all started.

Episode 10 | Demoday

Ji Pyung gives Dal Mi long-awaited answers and a confession. Seeking success on his own terms, Do San considers a golden opportunity.

Episode 11 | Exit

Kim Yong San forces Ji Pyung to reflect on his past remarks. In Jae and Dal Mi's companies showcase rivaling programs using the same technology.

Episode 12 | Acqhire

Alex Kwon shows his true colors, proving Ji Pyung right and fulfilling Samsan Tech's worst fears. Do San tells Ji Pyung about Won Deok's health.

Episode 13 | Comfort Zone

Dal Mi and In Jae's self-driving car is hit by a ransomware attack. Samsan Tech founders return after a successful three-year stint in San Francisco.

Episode 14 | Elevator Speech

Tasked with recruiting top developers into her company, Dal Mi pitches her idea at Samsan Tech. Do San gets away to clear his head.

Episode 15 | Minimum Viable Product

Jung Sa Ha and Lee Chul San begin dating in secret. A boozy, heartfelt conversation with Do San helps Ji Pyung make a decision about Dal Mi.

Episode 16 | Scale-Up

Do San and Dal Mi envision new goals for their future. Ji Pyung finds a way to pay forward his gratitude for Won Deok. In Jae returns to her roots.