Hot ice is the 165th short subject starring the Three Stooges.
The Stooges are wannabe detectives who inadvertently get their chance to crack a case in Scotland. They manage to stumble on a lead concerning the priceless Punjab diamond being stolen by a crook named Dapper (Kenneth MacDonald). With dreams of becoming genuine detectives, the trio head for Squid McGuffy's cafe asking for the whereabouts of Dapper. They manage to convince everyone at the restaurant that they are actually police.
While searching several rooms above the cafe, the Stooges stumble on Dapper's moll (Christine McIntyre), who hastily hides the Punjab diamond in a candy dish. The boys refuse to leave, suspecting Dapper will eventually show his face. While killing time, Shemp starts to flirt with the moll, and manages to swallow the ice along with some mints from the candy dish. The gal nearly has a nervous breakdown but quickly discovers the Stooges are nothing more than reporters. She calls in Dapper and his henchman Muscles (Cy Schindell) and frantically try to pry the diamond out of frazzled Shemp.
After all else fails, Dapper decides to cut him open. Moe and Larry are locked in a closet by Muscles while Shemp is tied down on a close by desk-turned-operating table. As luck would have it, there happen to be a bag of tools in the closet, which Moe and Larry use to saw their way out of the closet, and right into a gorilla's cage on the other side of the wall. The gorilla knocks Moe, Larry, Dapper, and Muscles cold. The beast, however, befriends Shemp, and helps him cough up the diamond. Moments later, Shemp explains how he managed to swallow to diamond by actually doing so again. In doing so, he accidentally swallows it, and the film ends with Moe and Larry administering surgery with the tools in order to get it out.