#*dramatic bow*

The episode begins with a strange and horrible smell wafting through the whole Octopod, and they learn the smell is being caused by Tweak, whose cleaning the engines with some kind of new oil.

Tweak tells them that she won't be finished cleaning for a while, but the smell is so bad that everyone decides to live in the Octolab until it clears out.

But now there's a new problem: with everyone living together in an enclosed space that's much smaller than the Octopod, they start having a few issues.

For example; none of the other Octonauts can sleep because of how loud Inkling and Shellington apparently snore.

Dashi spots some strange activity on the radar, and they go investigate. It turns out to be some hydrothermal vents, which have been shaking;

A rockslide occurs, and Barnacles, Kwazii, and Peso protect most of the creatures from the falling rocks—but one creature gets crushed—the scaly foot snail. They're fine, and they explain that their shell is so hard and tough, that they're not hurt at all.

They find that during the tremor that caused the rockslide, a large crack opened underneath the Octolab, and it's getting bigger. They try to lift it up using the Gups, but it doesn't work. They try to lift it themselves, but that doesn't work either.

The scaly foot snail and their friends show up, and they set the Octolab on top of them so they can move it. Surprisingly, this does work.

The Octolab is safe! Tweak calls, just to say that she's done cleaning (?)