Niki (Leo Woodall) is a gifted young piano tuner whose heightened sense of hearing draws the attention of criminals, who find out his talents are as useful for opening safes as for tuning Steinways.

With his once-promising musical career over, he works across New York with his mentor Harry Horowitz (Dustin Hoffman), encountering a range of characters, including composition student Ruthie (Havana Rose Liu), with whom he forges an unexpected connection. Niki’s safecracking work threatens his budding romance with Ruthie and pulls him into increasingly dangerous territory. Tuner blends romance, drama, and the taut suspense of a heist thriller.