Twenty-seven-year-old screenwriter, Elle, has the chance of a lifetime to write a big-budget movie set in New York City. The only problem? She's had writer's block for months, and her screenplay is due by the end of the summer.

Desperate for inspiration, Elle returns to NYC - the city she hates - and tries to throw herself into her writing. But then she meets her new neighbour: Parker Warren. He's the city's favourite handsome tech billionaire and he's also the guy Elle hooked up with in a stairwell two years ago. When seeing him again turns into a night of hate-fuelled writing, Elle realises Parker might just be her twisted muse.

So, when Parker needs to fake a steady relationship during his company's precarious acquisition and Elle needs to research a list of classic date spots in the city for her screenplay, they suddenly find they might just be exactly what each other needs.

Summers always end, and so will this agreement.

It's all pretend.

Promise.