When the Buccaneer Bunnies receive a note from an unknown enemy, Henry researches and writes a book called "Plan for Impending Danger from the Unknown Enemy Who Wrote the Scary Note," which helps him when the enemy finally arrives.
Pig brothers Dink and Fergus love playing at the beach, but when Dink wakes up from his nap in a grumpy mood, Fergus invites Dink to play with his new pirate ship of sand and gives him the starring role as pirate captain.
Braid Beard and his pirate crew return to retrieve the treasure they buried in Jeremy Jacob's backyard, but first they must help calm his baby sister, Bonney Anne, whom they awoke from her nap.