Fingernails (2023) Spoiler-Free Summary – What It's About

In a near‑future where affection has been reduced to a clinical metric, a single fingernail can determine whether two people truly love one another. The newly founded Love Institute has turned this controversial test into a business, offering couples a year‑long program of guided exercises and scientific scrutiny. The institute’s sleek, almost sterile spaces pulse with quiet tension, as participants are urged to confront the hidden layers of their relationships under the watchful eye of researchers who believe that love can be engineered and measured.

Anna, an out‑of‑work schoolteacher, accepts a position as an instructor at the institute, hoping to give her own wavering partnership a chance to survive the looming assessment. She keeps the job hidden from her boyfriend Ryan, whose own doubts about their future are amplified by the institute’s unsettling premise. At the heart of the program is Duncan, the charismatic founder whose optimism about the test’s potential masks a deeper obsession with proof. Among the staff, Amir serves as a senior guide, his confident demeanor and complicated bond with his girlfriend Natasha hinting at the personal stakes that swirl beneath the institute’s polished veneer.

The film unfolds as a slow‑burn examination of intimacy in an age of surveillance, where the line between support and manipulation blurs. Its tone is simultaneously clinical and haunting, inviting viewers to question whether love can ever be quantified without losing its mystery. As Anna navigates the institute’s enigmatic methods and the fragile dynamics of her own heart, she is drawn into an increasingly unsettling environment that forces every character to reckon with what it truly means to be connected—and whether the pursuit of certainty might be the greatest test of all.