Everyone had gone into Amethyst's room to locate whatever was stinking up the temple, and by extension the house. Amethyst's room looked like a junk yard or a dump, with piles of seemingly random objects strewn about the place. The seven of them had spread out a bit, and Steven had found the smelly object, a foil wrapped burrito, or at least that's what it used to be. When Amethyst came over to see, followed by everyone else, she gushed how that was her favorite food from Aqua-Mexican, a restaurant that had closed five years ago. She happily eats the odoriferous food, while the kids all look queasy. As they turn to leave, Robbie finds a picture of Amethyst and the other Crystal gems. Bismuth explains that their moms had been here for a very long time. Amethyst mused at how long it took Garnet to get the shark to pose. Spinel explained that gems don't age, and that except for the clothes, those four looked just the same in the days before the kids were born. Steven wondered aloud if gems celebrated birthdays, which got him a resounding no from the three present. Amethyst explained they live too long to keep track every year. Spinel explained that some gems in the upper levels of the hierarchy would throw balls for turns of millennia, but not for emergence days, which are the closest things gems would have for birthdays. Bismuth explained that from what she learned, humans track age because they have a limited amount of time to exist, where as gems could only die if their gems were damaged beyond repair. The thought of death disquieted the children but they weren't deterred to at least celebrate the gems becoming part of their family, and went outside to set up a big birthday party like celebration.

The Kids set up a picnic on the sand, pulled out birthday hats and their own birthday outfits. Steven's was a cape and crown, and the only thing that would fit Bismuth. Spinel wore Page's, a blue wrap shirt, that tied off at the waist with a ribbon. The twins didn't have an outfit for their birthday, but a shared blanket they normally huddle under and watch movies. Amethyst was wrapped up in that, wearing it like a scarf, since it's now much too small for both kids. Lion was trying to get away from Steven and Page attempting to put a party hat on the cat. It kept getting stuck on his nose. They managed to wedge the hat in his mane, and sat the group down on the blanket.

Robbie started by singing their dad's Birthday song, which was a little childish, but he sang with enthusiasm. His siblings clapped and sang along, but the gems looked perplexed, not understanding the need for it. Page brought down the Pinata. She explained the gist of the tradition, but Amethyst swung and smacked the paper animal into he water before she could explain that there was candy inside.. Missing out on food upset Amethyst, to the point of losing her lunch, but Spinel did explain that she was impatient and swung before she knew. It didn't help, but she knew her pink friend was right. Sophie brought out the cars for Kazoo Racing but before explaining, had a vision that the gems wouldn't like it anyway, and told Steven to go on with his part. Steven went into the house and came out dressed as a clown. He performed many different acts, but Spinel got upset at the last one, a pie in the face. She used to be an entertainer before she came to Earth and she would never waste resources just to be funny. Sophie and Bismuth declared the party over, Bis attempting to calm the gems down and Sophie, her siblings.

The kids walked off to town, standing side by side the way in. Muttering, Sophie complained. " I always have to act like your guys' mom, and I'm essentially the youngest!" Her voice rounded out and became a little deeper, though the others didn't notice.

Page had her own complaints, "You treat all of us like little kids, even though we're older, no wonder we act like them". Her voice got lighter and higher pitched. Again, nobody noticed the changes.

Steven and Robbie started to argue who upset the gems more, without looking at the other in anger. Steven kept acting as if he were an old man complaining about the kids these days, while Robbie acted as if Steven just needed to live a little, they were becoming teens within the year. During the argument Steven sounded like the old man he was acting like, and Robbie's voice started to crack like a teen's. They passed a shop window and saw their reflections, Steven, an old man, with his shirt stretched over the larger frame, Sophie, tall and regal, like a woman in her 30s, Robbie looked like a high school student, buff from sports, but covered in acne. Page unfortunately looked like she was about six, standing no taller than Robbie normally would.

The four of them rushed home to show the gems, Steven getting older along the way, and Page getting younger. The gems were alarmed when two people they hadn't seen before came up to their door holding a toddler with an old man leaning on the boy for support. Them they recognized Steven's shirt and figured out they were aging due to their state of mind. They kept trying to remind everyone who they were to no avail until Greg pulled up in the van. All four of the kids shouted for their father and made their way to the door. By the time they got to the man in question they had all gotten back to their proper ages.

Greg enjoyed the massive hugs he got as a welcome, and was glad the house smelled like normal again. He was not thrilled when the Gems explained what happened that day. He thanked the gems for being there and went off to bed.