Henrietta's parents show concern for her behavior and call her emo, making Henrietta angry since they don't know the difference between goths and emos. They send her to a camp that they think might help her be a normal person. When Henrietta returns from camp, Michael, Pete, and Firkle are startled to find that she has become an emo.
When Michael goes to Henrietta's room to tell her about the camp having turned her into an emo, Henrietta tells Michael that someday the emos would take over the world. After Michael tells Pete about what happened, his parents forcefully send him to the same camp as Henrietta because they think he was emo too.
Pete and Firkle decide to ask for help from the Vampire Kids. They go to Henrietta's house to show the Vamp Kids what Henrietta had become. The Vamp Kids' leader, Mike, has the idea of summoning Edgar Allan Poe to help them "break the spell" of the Emo Kids. Meanwhile, a camp gardener tells Michael (who was trapped in a chair) that the camp plants were turning the kids into emos. Michael discovers that the gardener works for those plants.
Pete, Firkle, Mike, Edgar, and a Vamp Kid plan to the camp to rescue Michael and set fire to the place. When they arrive at camp and are about to rescue Michael, Firkle reveals that he is an emo and points a gun at them. He and the gardener then lock everyone in chairs with a plant so that they can be turned into emos. Edgar Allan Poe appears and shoots the "leader plant" and finds that the plants were purchased at Lowe's Home and Garden. The gardener then discovers that everything was actually a joke created by his wife. Michael and Pete come to Henrietta's house to tell her that it was all a hoax and that she had become an emo on her own.
Firkle was the most recent kid shown to join the group. He has short black hair with long side-swept bangs. He wears dark purple lipstick, and black eyeshadow resembling bruises. His outfit consists of a black jacket, black pants, and black shoes. As an emo his hair is dyed purple at the roots and he wears a T-shirt with a skull on it.
Henrietta is overweight and has medium length straight hair that is parted in the center. She wears a black dress, a necklace with the cross on it, and black finger-less gloves. When a camp turned her "emo", she wore her hair parted on the side, grew her bangs longer, and dyed the ends of her pink hair, sporting a green headband as well. She wore running black mascara, pink lipstick, pink striped gloves, and a bat necklace instead of a cross.
According to Larry, Sarah Collins was part of the Vamp Kids two weeks ago, so it may be that she is the third most recent kid to have become emo. She has long blonde hair with black highlights and wears a black shirt with a picture of a skull on the right side, gray pants, and black shoes.