This film starts with a murder aboard a steamboat that already contains a detective who immediately goes to work investigating. He starts by gathering all the suspects when the ship gets in trouble in a bad storm. Forced to evacuate, all the suspects are loaded into the last lifeboat with the captain, first mate and detective. They end up castaway on a tropical island together with a gorilla and a strange Tarzan-like character...complete with his "Aaaaaaaaaaaaaaa-aaaaaaa" call. The murder victim stole precious diamonds and the detective thinks the murder is after them. The two women, Connie and Daisy, have a gorgeous wardrobe that seems to survive their ordeal...satin (or silk) and furs...not to mention their jewelry. The mystery gets solved and they get rescued by a French ship...but not before there is some unusual comedy by a drunken brother and a skeleton.
I think this is a fun historical number...but not the most interesting of mysteries and frankly I had a little trouble keeping the suspects straight. Not on my recommendation list unless you just want some light entertainment.