Carolyn Kaufman shares the requirements of the one-sentence pitch a writer submits to an agent.

Think about the winning entry: When you look into someone’s eyes, you see their soul, but when sixteen-year-old Emerson Taylor kisses their lips, she sees their pasts.

The pitch sentence needs to convey three things: the plot, the genre and the tone of the story, in one concise sentence.
This concise entry lets the agent know that the book is a YA with a girl protagonist, and it definitely conveys a mysterious, paranormal tone. 
 

The pitch sentence doesn’t need dialogue, a list of characters, the word count, and it doesn’t necessarily need the title. A pitch sentence is different from a novel’s opening sentence.

Do not write a pitch sentence followed by a semi-colon, because anything after a semi-colon is a complete sentence that’s no longer considered a one-sentence pitch.

Joan