A true friendship is hard to find. Finding unconditional loyalty is challenging. When Elwood P. Dowd finds both in Harvey, a 6-foot-tall white rabbit, those around him are quick to judge. Elwood's unwavering belief in the existence of Harvey causes confusion and concern among his family and friends, leading them to question his sanity. When his sister, Veta Louise Simmons, attempts to have him committed to a mental institution, she is committed instead, and a comedy of errors ensues!