Porcine adventures. Mr. Hornsby tells his class that they can expect a big test on Monday morning. The students get right down to studying, except Murdaidh. His mother hints to a legend about the 'Salmon of Knowledge', which is supposed to know everything. Murdaidh coaxes friends into spending all Saturday at the stream in hopes of catching this salmon. When the class settles in for the test on Monday, Murdaidh brings the salmon to his chair and gets stuck there. So much for getting out of studying.