Ben mistakenly thinks Bessie's making Happy her Mighty B sidekick instead of him, so he decides that he'll be her arch nemesis: the Hurtful Hornet. With the help of Mr. Pants (now Mr. Evil Pants), Ben turns to the dark side. Meanwhile, Bessie and Happy try to figure out the identity of the Mighty B's arch-nemesis after the Hurtful Hornet left his initials - H.H. - on sticky notes.
