Sandy puts her mouth over Pearl's blowhole, and Pearl exhales, inflating her like a balloon. Pearl agrees, saying 'I guess we mammals gotta stick together.' Pearl comes in and SpongeBob suggests she could help give air to Sandy because she is a mammal, just like Sandy. Krabs says he indeed has an air bubble or two and pulls in his eyestalks so Sandy can breathe them in. Krabs might have air in him, telling him Squidward says he is 'full of hot air' (which Squidward nervously denies). Patrick sucks them in, then blows into Sandy's mouth. SpongeBob uses a line of straws to reach them. SpongeBob and Patrick try to help Sandy get air and they notice air bubbles from the submarine on the ceiling. Krabs appears, wanting to know what is going on, and SpongeBob explains everything. She takes a patron's Krabby Patty and eats it, but it is later spat out by SpongeBob pulling her tail. Her suit's air supply is finally depleted and she removes her helmet. When they reach the surface, a delirious Sandy suddenly gets a craving for a Krabby Patty and drives the submarine through the roof of the Krusty Krab. and thinking she has spider webs on her face. As they make their way to the surface, the lack of air in Sandy's suit causes her to act crazy and hallucinate, doing crazy things such as licking Patrick, seeing atoms. Sandy tasks SpongeBob with driving the submarine to the surface, as the low amount of air is making her woozy. However, SpongeBob opens the door and water rushes in. Sandy only has a little bit of air left in her suit, so she goes to her submarine, which has enough air to go to the surface and replenish the air supply for her treedome. Water rushes into the treedome, filling it completely.

Patrick simply dismisses her as 'stupid.' SpongeBob tries to help clear the blockage by blowing spicy bubbles onto the airtank, but it melts.

Patrick suggests she breathes water like a 'smart person.' Sandy explains that land creatures need air. She tells them she is busy fixing a clog in the airtank. They tell her about their new discovery, with Patrick convinced he is a genius for his new idea, even thinking he is smarter than Sandy. SpongeBob and Patrick go to Sandy's treedome, where she is outside fixing an air tank. Squidward angrily yells at them out the window, but SpongeBob blows a big spicy bubble and it pops next to him, burning him to ashes and crippling him. The beheaded bonsai requests that Squidward avenges it. Just as he is about to clip off a straggler leaf, they scream and he lops off the entire head. Meanwhile, in his house, Squidward is clipping his likeness into a bonsai of himself. They burn each other's eyes repeatedly and the effect goes again. Patrick wonders if hot sauce is bad for their eyes. Then, he blows a spicy bubble into Patrick's eyes, doing the same thing to him. SpongeBob screams as his eyes glow red and disintegrate, then grow back. He dunks his bubble wand into the bottle and blows spicy bubbles into SpongeBob's eyes. Patrick is struck with an idea and takes out a bottle of hot sauce. SpongeBob suggests they 'spice up' their bubble blowing. In the beginning of the episode, SpongeBob and Patrick are blowing bubbles, but soon, they get bored.

Mia pixelhead double bubble trouble