Gye Yeo-wool has it all. Not only does she get to travel the world to write about it, but she can always count on returning home to her loving boyfriend of 12 years, Park Haesoo. But every couple has their problems, and Yeo-wool’s growing frustrated with being constantly diminished as the less-talented girlfriend of a famous Sci-fi novelist. Not willing to give up, Yeo-wool decides to take a casting offer for a TV show in the hopes of advancing her writing career and proving that she’s more than “Haesoo’s sweetheart.” But she didn’t expect change to come in the form of her fellow cast member, model Kang Woo. Kang Woo is charismatic, handsome, and something she’s never experienced before. Will his presence give her the bitter bite she needs in her sickly sweet life?