That's not how these things work, Steven! The plan is to keep it cool and let them come to me!
Steven and the Crystal Gems are on a mission to isolate a dangerous, fast-growing clinging moss from the humans in Beach City. The moss is capable of overwhelming and devouring any living thing that crosses its path. It originated from a nearby hill where Rose had planted it hundreds of years before, but had since moved into a valley lagoon. According to Pearl, despite the dangerous nature of the moss, Rose planted it because she saw beauty in everything, "no matter how gross". To protect the oblivious human population, the Gems section off the area with police tape while they decide how to transport it away.
Steven breaks for lunch at Fish Stew Pizza and there he sees Lars standing outside the diner. Lars seems uncomfortable and is less tolerant of Steven's enthusiastic greetings than usual. He seems uncomfortable trying to indiscretly observe three teenagers eating inside. When Steven asks what he is doing, he replies "just playin' it cool". Steven sees three teenagers eating inside the diner. Lars tells him their names are Buck, Jenny and Sour Cream - the "cool kids" - and warns Steven not to go inside. It becomes evident that Lars is indiscretely observing the cool kids, hoping they will notice and invite him to hang out with them. The cool kids leave the diner, and Steven offers to alert the cool kids to Lars' presence. He is mortified and tries to prevent Steven doing so, insisting that he will ruin his chances. However, Steven's genuine and bubbly personality appeals to the cool kids and they invite he and Lars for a drive through Becah City.
In the car, Steven continues to engage the cool kids by being himself. Lars struggles to gain their approval as he pretends to be like them and have similar interests. However, each time he makes a statement, the cool kids say something else that renders his efforts useless. He directs his frustrations towards Steven, blaming him for his failure. Eventually, the group decides to check out Dead Man's Mouth, which turns out to be the same place from the beginning of the episode. Despite Steven's attempts to keep the cool kids away, the cool kids and Lars decide to go for a swim.
Steven manages to stop Lars by hugging his leg pleading him not to go in. As Steven restrains Lars, the moss moves in and quickly overtakes the teenagers. Steven and Lars manage to drag them from the water, but their attempts to free them are in vain. Lars unfairly blames the situation on Steven and derides Rose, calling her "weird". Steven angrily yells at Lars to defend his mother, stressing that she saw beauty in everything regardless of what it was including "jerks" like him. Hoping that the answer to their problem lies on top of the hill, Lars and Steven drive the moss-covered cool kids there. The journey is hazardous as Steven helps Lars drive the old car, as neither of them know how to drive a stick-shift. On the way, the moss begins to envelop the car and, eventually, Lars and Steven.
Miraculously, they make it to the top, but the moss had grown over all of them. As they are covered in moss, the sun rises from behind the clouds and turns the moss into multiple beautiful flowers with Rose Quartz gems in their center. The cool kids wake up and admire the view they have of Beach City. Steven claims that Lars brought them there and in thanks he offers Steven a very short lived high five. In the background, Sour Cream "raves" to the scenery as the episode ends.
- Sour Cream
- Jenny Pizza
- Buck Dewey
- Rose Quartz (mentioned, vision)
- Kiki Pizza (cameo)
- Kofi Pizza (indirectly mentioned)
- Mayor Dewey
- Magic Moss (debut)
- Mayor Dewey's Bodyguards
- Jenny's Car (debut)
- Kiki is revealed to have a sister named Jenny, as well as this being her first role.
- They are later revealed to be twins in "Joy Ride".
- Bill Dewey is revealed to have a son named Buck Dewey.
- Lars seems to be on much better terms with Steven by the end of the episode.
- In early development, this episode was called "Steven, Lars, and the Cool Kids".
- The snake on Lars' shirt resembles a character from the Pokémon franchise named Ekans.
- This episode's title is a reference to the 2007 film titled, Lars and the Real Girl.
- A billboard for Dogcopter 3 (the movie Connie and Steven go to see in "Lion 2: The Movie") was seen at the parking lot of the pizza shop.
- Steven gives Lars a high-five similar to the one in this episode in "Lion 3: Straight to Video".
- After passing by Funland Arcade, Jenny's car is on the left side of the road, but in earlier and later scenes, it is on the right.
- When Lars starts talking to himself outside of Fish Stew Pizza, the businesses that are to the left disappear, so that you can see the back of the temple.
- When the cool kids get to Dead Man's Mouth, Pearl's police tape bow is in the middle of both rocks, while it was originally on the left rock. It switches back in the next scene.
- When Buck is sitting in the car, he is on the right of Steven and to the left of Lars. When they reach Dead Man's Mouth, Buck is suddenly to the left of Steven and to the right of Lars.
- Lars did not know how to drive a stick-shift despite teaching Steven how the stick-shift works after Steven made the car go into the moss-infested lake.
View the episode's transcript here.