While giving a private performance for a visiting monarch, concert pianist Montgomery Royle is deafened when a bomb is detonated in an attempt to assassinate the foreign ruler. With his career over as a result of his injury, Royle returns to New York City with his sister Florence, close friend Mildred Miller, and considerably younger fiancée Grace Blair. After abandoning thoughts of suicide, Montgomery discovers he can lip read, and he spends his days observing people in Central Park from his apartment window. As he learns of people's problems, he tries to help them anonymously and becomes absorbed in his game of "playing God".