A fingerprint expert figures out who killed the mayor.

Sailor meets singer in Cuba. He's due to ship out, but hits it off with her, so he sticks around. Trouble brewing on many fronts - singer's best friend doesn't like the sailor, and singer has another suitor anyway. Rich guy takes her to all the fancy Cuban sports events - jai-alai, horse racing. Much more glamorous than spending time with Sailor. Can he win her over before he gets in trouble for letting his ship sail without him?