At school, Mrs. Johnson arrives to her classroom, ready to announce a big project. The project is revealed to be taking care of an egg, and whoever can protect their egg for the whole week will be rewarded with a big waffle breakfast, but if the egg is damaged in any way, they'll fail the project. Lincoln and Clyde are ready for the assignment, but Mrs. Johnson tells the boys that she'll be choosing the partners, much to Lincoln and Clyde's sadness. Clyde is partnered with a student named Penelope, and Lincoln is partnered with Ronnie Anne. Lincoln however, is terrified, because he sees Ronnie Anne as a reckless person who's completely careless. While Clyde and Penelope quickly get along to take care of their egg (which they nicknamed "Calliope"), Lincoln acts completely cautious when Ronnie Anne tries to get a glimpse of the egg (which Lincoln nicknamed "Rochelle", and Ronnie Anne nicknamed "Toby").
During lunch, Ronnie Anne asks Lincoln if she could watch the egg. However, Lincoln, fearing what she could do to the egg, makes an excuse to see Lisa, since she's at a nearby table, much to Ronnie Anne's frustration. During art class, Ronnie Anne shows up, forcing Lincoln to hide in the supply closet. While hiding in the closet, Lincoln hears Ronnie Anne say that once school ends, she's going to get the egg, and won't fall for anymore excuses. Lincoln, needing to come up with a plan, sees numerous containers of rubber cement, causing him to get an idea. Sometime later, Lincoln has made a complete replica of the egg; one that is indestructible. The moment he finishes, Ronnie Anne arrives, and Lincoln gives Ronnie Anne what he thinks is the fake egg. Befuddled by his sudden change in attitude, Ronnie Anne leaves with it.
Arriving home, Lincoln puts the egg down, and begins to relax. In the next room, Lana and Lola enter the kitchen, while pretending that the floor is lava. As Lana jumps from furniture to furniture, she accidentally knocks the egg off the table. Lincoln tries to save the egg, when suddenly, it begins bouncing around like rubber. This causes Lincoln to realize that he gave Ronnie Anne the real egg instead of the fake egg by mistake.
Under stress, Lincoln arrives to the Santiago house, and knocks. Ronnie Anne answers, and asks what he's doing here. Lincoln says that he just wants to see the egg. Lincoln enters the house, and sees the egg, completely safe. When Ronnie Anne exits the scene, Lincoln discretely swaps the real egg with the fake egg. Just as he's about to leave, Lincoln notices that Ronnie Anne is a really thoughtful and helpful person, as she removes a splinter stuck in Bobby's finger, washed all of his work uniforms, and already has dinner prepared. Realizing that Ronnie Anne is not as reckless as he thought, Lincoln decides to put the real egg back. Suddenly, the fake egg begins bouncing around, and Ronnie Anne takes note of this. When Ronnie Anne realizes that there are two eggs present, Lincoln, realizing he has been caught, backs up to avoid Ronnie Anne's incoming wrath after saying that he thought he couldn't trust her with taking care of something so fragile. Suddenly, he bumps into the table, causing the real egg to fall and break. Upset that they're going to flunk the assignment, and that Lincoln misjudged her, Ronnie Anne tells Lincoln to leave.
As Lincoln sadly heads home, he encounters Clyde and Penelope, who are taking Calliope on a stroll. After a brief conversation, Lincoln realizes that he knows how to set things straight, and head off. Sometime later, Lincoln arrives to the Santiago house, carrying a basket. After setting the basket down on the front step, Lincoln rings the doorbell, and takes cover in a bush. Ronnie Anne answers the door, sees the basket, and reads the note attached to it. The note says that there's a replacement egg inside, and Ronnie Anne can easily tell that Lincoln is involved in this.
Coming out of the bush, Lincoln explains that he talked with Mrs. Johnson to let Ronnie Anne get a second chance, because he learned that she's not as bad as he thought. Mrs. Johnson decides to let Ronnie Anne have a second chance, as well as Lincoln, since she told him that he finally learned the true meaning behind the assignment. However, they won't be rewarded with the big waffle breakfast, but Lincoln doesn't care, just as long as he and Ronnie Anne get the assignment done. Ronnie Anne, grateful for what Lincoln did, invites him inside, since they're having waffles for breakfast. After walking into the kitchen, Ronnie Anne suddenly grabs the egg, and breaks it against a bowl. However, this just turns out to be a prank, as she still has the egg in her pocket. Lincoln, realizing it's just a small prank, lets out a forced sigh of relief.