“The earliest signs of heart problems are often found in the spotting, bending, or discoloration of fingernails,” reads the quote that opens Apple TV’s latest sci-fi offering. It’s but a partial explanation of the film’s unconventional title: the premise of Fingernails is actually much more literal (and painful) than one might think. In the near-future, fingernails are also the key to intangible matters of the heart — even to the question of compatibility. Lucky couples each surrender one nail in order to determine whether they’re really in love. The process, conduced without anesthesia, borderlines on torture. But it’s framed as a necessary evil, the only way to ensure you’re not wasting your time with the person you think is the love of your life.
