Startled by a rumbling sound that could only be heard by the terrifying Hefarunpu, the crew of the Hundred Acre Forest set out to capture this terrifying creature. Due to being too young to participate in such a dangerous adventure, Xiaolu chose to search for it himself - much more successful than his friends. But when Roo encounters a young and mischievous Heffalumps named Lumpy, he soon realizes that Heffalumps is completely different from the creature in the ominous story he heard, and that this creature is equally afraid of his foolish friend. Roo and Lumpy formed a sweet friendship and worked together to eliminate unfounded fears among their respective friends and family.
