The Happy Tree Friends decide to go to Lumpy Land in order to have a fun time, though when the rollercoaster ride breaks down, Lumpy decides to perform some heavy maintenance in order to get everything running again. Meanwhile, Sniffles decides to try out his new metal detector in an attempt to find something valuable.
Cuddles and Giggles decide to have a snowball fight, but when a rock is accidentally thrown, tragedy strikes. Fortunately, Splendid is there to save the day, even though he often causes more problems than he resolves. To make matters worse, he has to try to save the day while simultaneously washing his clothes at the laundromat.
The Happy Tree Friends decide to throw a surprise birthday party for Flippy, so they’re all working hard in order to make the proper preparations. They baked a cake, mixed punch, put up decorations and even made various party games to play. All that’s left for them is to wait for the birthday boy, who just happens to love surprises.
Disco Bear has always had three primary loves in his life: his love of beautiful women, his love of disco dancing, and his love of delicious food. However, when the latter love begins to affect his first two loves, due to the large bulge in his belly, he decides to go on a diet, and hit the gym, in order to try to get back into shape.
While at a rest area, Handy and Mole’s vehicle is stolen by Lifty and Shifty. Fortunately for them, Sheriff Lumpy is on the scene and he tracks down the devious duo, but when they disguise themselves as Handy and Mole, Lumpy arrests the real Handy and Mole. Now, the two friends must go on the lam in order to taste freedom.
Animal Control Officer Lumpy has seen a lot of action in his career, though today’s been busier than ever. Shortly after capturing a giant squid, he receives a call from Pop, who bought a dog for Cub; the dog is very nice, though it turns into a vicious killer upon hearing a whistle. Now, Lumpy must do what he can to capture this menace.
It’s yet another day in the world of the Happy Tree Friends and the local diner is serving breakfast. However, when Nutty arrives, he decides to steal a bag of sugar in order to take it home; though when he trips up and accidentally trades his bag of sugar for a bag of concrete, bad things happen, for both Nutty and the road crew.
Russell loves the high seas, and after finding a treasure map, he decides to head out in order to find it, along with First Mate Lumpy. Unfortunately, Lifty and Shifty have taken notice of their map and they plan on beating them to the treasure, and if they don’t, they’re not beneath using ruthless tactics to steal the treasure by force.
It’s just a normal day in Petunia’s life, that is, until she discovers that things aren’t going as planned. You see, Petunia has OCD, and after various events forces her toilet to get clogged up, she has to call Janitor Lumpy to save the day. Unfortunately for her, Lumpy isn’t good at his job, and like it or not, she’s in for one rough night.
Giggles and Mime have decided to visit Petunia’s house in order to eat breakfast with her, though things go terribly awry when she bursts into flames. Desperate, Mime tries to get the attention of the local fire-fighters, and once they get everything sorted out, they zoom off in an attempt to save the day.
Wanting to put an end to global warming, Giggles vows to become an environmentalist. However, when she goes to take a swim in the local lake, she discovers that it has been a trash dump for quite some time. She decides to rally her friends together in order to clean the place up, though trash-man Lumpy has other plans.
When Petunia discovers that one of the lamps is broken, she decides to throw it out, much to the delight of Lifty & Shifty. However, before the two get away with their “product”, it falls out of their van and into the hands of Nutty, who discovers that it’s actually a genie bottle. Now, Lifty & Shifty will do anything to get their lamp back.
Scoutmaster Lumpy decides to take his troop on a hike through the woods, though things go awry when they split up in order to bond with nature in their own unique way. Now, Lumpy must do his best to keep his troop out of danger, all the while worrying about the many dangerous animals who live in the vicinity of the woods.
When Lifty and Shifty break into the local museum, they get more than they bargained for, as Splendid shows up. However, when they drop their goods, a chest opens up to reveal a green acorn, which has the power to make Splendid vomit. Now that Lifty and Shifty have the upper-hand, can Splendid stop their crime wave?
When Pop decides to take Cub to the park, he goes to get some ice-cream. However, before he can even take a step, he notices that Cub has gone missing, and the only place he could have gone is down a large hole. Now, Pop must work with Sniffles in order to create a large drill that can dig down and rescue his son.
When Mime discovers that a new unicycle is being sold at a local store, he decides to purchase it, only to realize that he has no money. In order to remedy his situation, he applies for various jobs in an attempt to get the money he needs, though despite the fact that he keeps messing up, he’s intent on trying until he succeeds.
When Sniffles breaks his glass of milk, he decides to build a time machine in order to go back and prevent this from happening. However, when Lumpy arrives at his home, he realizes that he now has the power to alter fate itself.
Sniffles has decided to lead an expedition in order to claim the Cursed Idol, and take it back to his museum. However, when the Cursed Idol summons The Crack to protect it, Sniffles receives far more than he had bargained for.
When Handy fails to build Giggles a good house, the Happy Tree Friends decide to lend the both of them a hand. As the community comes together to build Giggles the best home she’s ever seen, things take an unexpected turn into the bizarre.
Lumpy has recently grown a very large ear of corn to enter into the state fair, but over the months, he’s grown to love the corn as if it were his child. Now, as the day of the fair is approaching, Lumpy must protect his corn from the dangers that exist in the world.