While helping Gina Giant harvest vegetables from her garden, Wally and Norville meet a garden gnome. His name is Zach, but he doesn't like his name because he thinks that 'z' isn't a very fun letter. Wally decides to show Zach just how many fun words 'z' can make! It's all going great, until Bobgoblin convinces Wally to make a zillion zombie zucchinis, which take off with Gina's vegetables!