Tom sneaks into a secluded area for some fish poaching. The lake is guarded by Spike, but Tom has his same old tricks for taking care of him. In his bait box he has a captured Jerry, who he promptly disguises as a worm and casts into the lake.
Some horrible sort of Gator/Fish creature pops up and decides he'd really like to get a bite of Jerry, but he'll be damned if he's gonna let Tom catch him.
There are a couple of funny moments in this cartoon but it's mostly just generic stuff and recycled gags. The ending isn't really up to much either, it's all just plain uninspired.