 Psychiatrist Jack Mickler dissuades a would-be suicide - the 21-year old, costumed like Zorro claiming he s Don Juan, is held for a ten-day review in a mental institution. Mickler, about to retire, insists on doing the evaluation and conducts it without medicating the youth. "Don Juan" tells his story - birth in Mexico, the death of his father, a year in a harem, and finding true love (and being rejected) on a remote island. Listening enlivens Mickler s relationship with his own wife. As the ten days tick down and pressure mounts on Mickler to support the youth s indefinite confinement, finding reality within the romantic imagination becomes Jack s last professional challenge.