After he reunites with his father and baby sister, Bart is seen laying in his bed, thinking about his sister Lisa. As he was still upset after he and Lisa are separated because of his aunt Patty, he is afraid that his mother will be mad at him for misbehaving at his aunts, but he finally free and escaped thanks to the help of Sapphire and Fate, when evening falls, Bart asks his father if Lisa needs to return.
"Yo Homer, when will Lisa be return after she was separated from me." said Bart.
"She's still missing, my sister-in-law separated you and your sister." said Homer as he is upset about Lisa's disappearance.
Just then, a breaking news comes on tv.
"Lisa Marie Simpson, a eight-year old girl, was reported missing after her aunt Patricia Bouvier drove her off into a beauty pageant school, leaving her ten-year old brother Bartholomew J. Simpson behind in the forest, it is unknown if the little girl will be found or reported dead." said Kent as he announces Lisa's disappearance.
"No…my sister cannot be dead…." sobbed Bart.
"Son, she is not dead, I'll make sure you will find her after your aunt did this to her." said Homer.
"Hmm-mmm." said Bart as he nods yes to his father Homer.
The next day, Bart is walking in the corridor at school while humming. Still hummed, he opens the school locker to put the stuff in there as he closes it, however, he is interrupted as he gets scared by a tomboyish beautiful girl, who is his childhood friend.
"Hiya Bart." said the tomboyish beautiful girl as she waves to her childhood friend Bart.
"Ahh! Oh, hi Mabel, you always scared me." said Bart as he says hello to his childhood friend, the tomboyish beautiful girl, now called Mabel, who is Lisa's best friend.
"Sorry, I was only saying hello to you." said Mabel as she gets Bart up.
"Anyway, tell me about it yesterday." said Mabel.
"Well.." said Bart.
"Yesterday my sister Lisa and I escaped from Dr. Janetson and my Aunt Patty pushed me and left me in the forest as she took Lisa into the beauty pageant school, I just cannot believe what happened to her, it looks like she is gone missing, i'm scared that she will be found dead." said Bart sadly.
"No Bart, she's not gonna die, are you sure you want to find her." said Mabel as she comforts Bart.
"Yeah, hopefully I will search her after classes." said Bart.
After classes, as Bart looks to find his missing sister Lisa, Sapphire and Fate comes to him.
"Hey Bart, still didn't find your sister." said Sapphire.
"No, I've tried looking for her, but failed." said Bart.
"I cannot believe Lisa is absent in school, I really hope you will find her soon." said Fate.
"Hmm…" worried Bart.
As Sapphire and Fate talks to Bart, a sweet tomboyish young girl named Josie appears while running.
"Guys, wait!" said Josie as she continues to run.
"Dude, what took you so long!" yelled Bart as he scolds Josie.
"I know, I'm sorry, I found the beauty pageant school." said Josie as she stops running.
"What…" said Bart in a worried tone.
"It is where Lisa is stuck in here by your Aunt Patty, it looks like she is not dead, I found her." said Josie as she finds Lisa.
"Really, can I free her." said Bart.
"Nope, sorry Bart, I only found your sister." said Josie.
"Aw man." facepalmed Bart.
After school, in afternoon, Bart remembers how much he misses his sister Lisa before Josie found her. However, just as he is thinking, he covers his ears as his mother's angry voice appears and often yells at him for her sisters.
"Bad boy, bad boy, be nice to my sisters, be nice to my sisters, chores to do!" said Marge in her angry voice.
"AHHHHHHHHH!" screamed Bart as he had enough of his mother's angry voice.
Just after Bart screams about his mother's angry voice, Mabel comforts him.
"Bart, dude, calm down, she's not mad at you, she's nice." said Mabel as she comforts Bart.
"I know Mabel, that is because of my aunts when I was thinking for my sister." said Bart.
"Yeah I know, my best friend Lisa needs to come home soon, not missing." said Mabel.
As they walked at 742 Evergreen Terrace, which is Bart's home, Mabel and Bart talks to Homer.
"You mean…Lisa is going to be found…." said Homer.
"Yeah, she isn't dead, she is going back home after she escaped the beauty pageant school." said Mabel.
"She escaped." said Bart in a confused tone.
"Yes, I think she returned home later." said Mabel.
In a flashback about one year ago when Lisa was seven and Bart was nine, Mabel is sad because she doesn't want to be alone from them, as she is thrown by their aunts Patty and Selma.
"Little Mabel, my dear, I'm sorry, our sister is at Hawaii until further notice, your friends Bart and Lisa will be returning home for five years, so long Homer and Maggie." said Selma as she talks to Mabel.
As Patty and Selma entered the car, Bart and Lisa cried as they miss Mabel.
"Mabel! Please don't leave us!" cried Bart.
"Mabel! Help us!" cried Lisa.
"My kids! No!" cried Homer as he holds Maggie.
As Bart and Lisa are now at Patty and Selma's house for five years, Mabel begins to cry.
"BART! LISA!." screamed Mabel as she cries.
Back in the present day, Bart and Mabel becomes sad about their past one year ago.
"I can't believe you were gone until you came back, you're still my friend." said Mabel.
"Yeah dude." said Bart.
Just then, in the forest, Sapphire and Fate's older sister, Crystal, a fourteen-year old teenage girl, sees the key charm that Bart gifted for Lisa. While searching, her boyfriend asks her if Bart was still here.
"Crystal, did you found Bart." said Crystal's boyfriend.
"No, I think he returned home after one year of his trip to his aunts." said Crystal.
"But what about his sister Lisa." said Crystal's boyfriend.
"She still didn't come back, but i think she will return home soon." said Crystal.
"Patty Bouvier…" said Crystal's boyfriend as he knows Bart's aunt Patty.
"You know her." said Crystal.
"Not yet…" said Crystal's boyfriend.
At the abandoned forest, Josie looks for Lisa, who escaped from the beauty pageant school.
"Lisa, where are you." said Josie.
"I'm right here." said Lisa after she escaped the beauty pageant school.
"Lisa, don't worry about that, your Aunt Patty did this to you." said Josie as she gets Lisa up.
"Yeah, that is because of Dr. Janetson." said Lisa.
"You have to return your father and your siblings, they are waiting for you." said Josie.
"Okay Jo, let's go…" said Lisa.
Josie and Lisa walked together to return at Lisa's home, the 742 Evergreen Terrace. A curious young girl named Linda looks at them after Lisa's disappearance.
"Lisa…is found…" said Linda as she is hiding in the tree.
At 742 Evergreen Terrace, Josie knocks at the door after she found Lisa as Bart opens the door.
"SIS!" said Bart as he reunites with Lisa.
"BART!" said Lisa as she reunites with Bart.
"Lisa, sweetie!" said Homer as he reunites with Lisa.
"Lisa! Lisa!" said Maggie as she reunites with Lisa.
"LISA! WELCOME BACK!" said Mabel as she reunites with Lisa.
"Guys, you missed me." said Lisa as she reunites with her family and her best friend.
"Same, I've missed you so much." said Mabel as she misses her best friend so much.
"I've found Lisa after she was saved from the beauty pageant school." said Josie after she found Lisa.
"Thanks Josie for rescuing her." said Bart in tears of joy, thanking Josie for rescuing his sister.
"You're welcome." said Josie.
Josie and Bart hugged together after Lisa was found, and the boy and his sister will make sure that his aunts won't get them.
End of Act 2.