Obsession with Novels

What if a harmless desire to know more about your boyfriend's ex turns into a true obsession?
Twenty-four-year-old bookstore employee in New York, Naomi Ackerman, is desperately trying to write her first novel but cannot find the perfect plot. When after... a series of unsuccessful dates she meets Caleb – a charming and intelligent guy with a Welsh accent, she realizes: here it is – the right topic. Love. But suddenly, an unplanned character appears in this story – Rosemary, Caleb's ex-girlfriend…
It turns out she also lives in New York, works with books, and suspiciously resembles Naomi herself. Not to mention that both have fallen in love with the same guy. Could the girls have something else in common? Burning with curiosity and anxiety, Naomi begins to follow Rosemary. She decided to experiment on her boyfriend and his ex, but at some point, she loses control over everything happening…