The gang promises to keep away from girls on St. Valentine's Day, but Alfalfa can't resist Darla.

The gang puts a phony absent note on their teacher's desk so they can go to the circus, then have to get it back when they find out that the class was going on a field trip to the circus anyway.

Allen Colby, heir to a huge fortune, is presumed drowned after an ocean liner sinks off the coast of Honolulu. Mysteriously, Colby reappears at his mansion only to be murdered soon after. When his body is discovered during a seance, everyone in attendance becomes a suspect, and it's up to Chan to find the murderer before he or she strikes again.