Envy rears its ugly head when Norb seemingly gets a better Arbor Day (beaver Christmas) present of a killer train set. Dag sets out to sabotage it when all he gets is an air freshener.

Spring is in the air, and so are thousands of spawning salmon. Norb and Dag have unwittingly built their dam right in the middle of the salmons' migratory path. It's the irresistible force of nature vs the immovable beavers.

Daggett gets taken in by EC comics books' "The Konspiracy Komiks Presents: The Attack of the Howler Leeches" and sends away for the Konspiracy Kevin head doll. When Dag pulls the string, the head warns him that all animals will be attacked by the Alien Howler Leeches. He panics while Norbert thinks he's been scammed. Dag persists in his paranoia, so Norb recruits Big Rabbit, Barry the Bear, and Truckie to justify his fears.