From Netflix:

A pianist returning to the stage five years after a public meltdown learns that a sniper will shoot him and his wife if he plays just one wrong note. But the gunman’s twisted motives go far deeper than anyone suspects.

Although the idea behind the story is novel (some say ridiculous), the film itself was nothing special. Critics panned the film.

After the film was over I still did not know the motives of the killer. Even Wikipedia offered no clues.

Try some other film.