Na Bong Sun is a meek assistant chef at Sun Restaurant, where she works for the famous and arrogant Kang Sun Woo. Shin Soon Ae is a virgin ghost who constantly possesses women to seduce young men.

Soon Ae finds herself stuck in Bong Sun's body so she does her best to adapt to Bong Sun's life. Sun Woo faces a popularity decline when a food blogger sues him for assault.

Soon Ae is drawn to her father's restaurant and tries to help him by stealing supplies from Sun Woo's storage.

Bong Sun negotiates a deal with Sun Woo to stay at the restaurant for a few nights until she finds a new place, and Soon Ae discovers that Sun Woo is the man of vitality she's looking for.

Bong Sun refuses to let Soon Ae possess her again, and her persistence in driving away the ghost leads to a bit of an accident at the restaurant.

Back in Bong Sun's body, Soon Ae checks after her sickly father and begins to receive cooking lessons from Sun Woo.

Sun Woo gives Bong Sun personal cooking lessons, getting closer to her true shy self. Soon Ae battles the possibility of becoming an evil spirit and not fulfilling her wish in time.

With Bong Sun allowing Soon Ae to possess her, they try and get closer to Sung Woo on a camping trip he has planned for him and his employees.

We learn more about Sung Jae's past while Bong Sun and Sun Woo go through their first days as an official couple.

Soon Ae struggles with the fact that she's just started to experience love, and yet has little time to spare. Hae Young begins to meddle in her son's love life.

Soon Ae does her best to extend her time on earth, and discovers that her death was ruled as a suicide.

Bong Sun does her best to cook a dish for the restaurant when she lacks the experience that Soon Ae had gained. Soon Ae resolves to ascend to heaven, but discovers a secret about Officer Choi.

Sun Woo doesn't believe Bong Sun's story about being possessed by ghosts. Soon Ae starts observing Officer Choi more closely.

Another death propels Soon Ae to take action with Sun Woo and Bong Sun's help.

Flashbacks reveal how Soon Ae died. Sung Jae takes action against Bong Sun when he realizes that his crimes are soon to be uncovered, with disastrous results.

The stunning epilogue of Oh My Ghostess wraps up the saga of Soon Ae and provides closure for all those around her.