By day, Diana works as a line cook at her familys French café in the Upper West Side of Manhattan, juggling brunch service and finicky customers. She's happy to help at the café, but it's financially in dire straits, and she's not sure how much longer she can help keep things going. By night, she escapes into the Sam Raymond fandom, penning smutty real-person fanfiction about the dreamy rockstar-of-the-moment for thousands of readers. And those readers are eating it up more than usual after a vocal injury that's sidelined Sam's tour. One of Diana's most avid followers, the mysterious "S," has even sent her a series of flirtatious DMs on Tumblr.

When the real Sam Raymond shows up at the Diana's café for brunch, her carefully separated worlds collide (and she's gotta make the best goddamn lemon crème crêpes of her life). Despite her nerves, the crêpes are a hit, and Sam keeps coming back for more; soon, the two strike up an easy friendship over their shared taste in music and love of NYC.

But Sam has secrets of his own. He's finding it harder and harder to suppress his panic attacks, with setbacks slowing his vocal recovery and threatening a potential end to his singing career. The only comfort he finds is in interacting with a clever online fic writer in, embarrassingly, his own fandom. And then he meets Diana. As Sam isolates himself away from his normally chaotic life, he becomes intrigued by this cute chef and her big, boisterous family. He can't help but spend more time at the classic French bistro they call home.

As the writer and the rockstar grow closer, Diana must balance her connection with S and attraction to Sam and her guilt in keeping up her pseudo-Sam-themed stories, which she knows is her best chance to get out of the kitchen and become a professional writer. Meanwhile, Sam is forced to confront the anxiety threatening to break him once and for all, or he risks losing both his connection with Diana and his career. Will this end in OTP or disaster?