Grieving the loss of a best friend she couldn’t protect, an ex-bodyguard sets out to fulfill her dear friend’s last wish: sweet revenge.

Disguised under the shadows of a mask, a crew of desperados band together under the leadership of a criminal mastermind known only as “The Professor” to pull off the biggest heist Korea has ever seen.

Go Ho is a 29-year-old advertisement contractor who wants success in both her career and romance. Unfortunately, neither seems to be working out particularly well because the only two men in her life are Kang Tae Ho, her short-tempered boss, and Hwang Ji Hoon, her ex-boyfriend. Dealing with their increasingly irritating behavior and her decreasingly abundant time until she hits the “big thirty,” can Go Ho reach for the skies and capture her dreams, or will this starry night end in darkness?