I miss you..I miss you everyday, I can't get you out of my head. I can't get IT out of my head, that day… Your screams, the sound of you hitting the ground, the blood, the ambulance sirens. Why god why? Why did I even do it? Why am I such a bad kid? Why was I always so mean to you? Lisa, I never got a chance to remind you or even tell you that I love you, I always have, always will.. I'm sorry…

Bart Simpson, 10 years old and emotionally scared. Not from the fact his father used to brutally strangle him whenever he did something wrong or his dad was mad, not scared because of nearly being murdered by a nutcase, but scared by the death of his little sister. Bart used to be a prankster, he loved it. He loved the attention he would get from it and the laughs from the kids at his school but no one was laughing this time.

The day started as usual, Bart got up, got dressed, ate breakfast with his family, and got on the school bus. He sat down next to his best friend Milhouse and starts talking about a big prank he's going to pull. "Who's it going to be Bart?" "That's a secret." "Oh come on!" "Nope, I ain't telling." Bart smiled as Milhouse tried to get him reveal who'll be the victim of his new prank. "Face it Milhouse I won't tell you, it's a surprise." He said this while looking at his little sister who was reading a book, luckily Milhouse doesn't see him look at Lisa and Bart snickers as he gets ready to prepare for the prank. They get off the bus and get to their class while Bart prepares his prank. Soon during a break Bart sets up the prank as Lisa walks upstairs, Bart quickly hides and snickers as he launches his prank onto Lisa. At first it goes as planned, Lisa found herself all wet and yelled out his name while he laughed his ass off. Then suddenly Willie came in and slipped on the wet floor, he had been carrying a cart and it quickly races toward Lisa who couldn't get out of the way in time. The cart sent her flying through the air and out the window where she hit the pavement, the children screamed while Bart ran down (nearly slipping) and saw his little sister laying in a puddle of her own blood.

"Oh god no." Bart said to himself as he looked down, he quickly ran down the stairs and out of the school and to Lisa. "Lisa! LISA! Please don't die, please!" He sobbed as the ambulance arrived and took Lisa to the hospital alongside her grief stricken brother. Time seemed to slow down as all he focused on his sister until they arrived, he was forced into the waiting room by nurses when he tried to follow Lisa into the operation room. He sat there crying his eyes out when he heard his father asking where his daughter was, "Oh god…He's gonna kill me…" Bart thought to himself while his family walked in and immediately Bart brakes into tears as he seems them. Homer immediately goes to strangle him but pulls back when he sees the genuine fear in his eyes and his cries, he instead punches the wall and yells "DAMNIT! Why? WHY DID YOU DO THIS?! WHY YO-" "Homer stop!" Marge yells out as Homer was about to strangle him again, "Yelling at him won't solve anything!" Homer with tears in his eyes questions her, "DON'T YOU CARE MARGE!?" "I do! It's jus…" She starts sobbing while Homer calms himself down and sits her down. Abraham Simpson later arrives along with Selma and Patty, they all wait as the doctor's operate on her. It seems to be an eternity till Dr. Hibbert arrives and tells them at least some good and bad news.

"Lisa is alive, however she's in a comma." The Simpsons family gasp at this with Bart tearing up and Homer getting mad. "Boy…You just got lucky.." Bart turns to Dr. Hibbert and asks if they could visit her. "Why yes, in fact I was just going to mention that. Let me show you all to her room." They all follow and see Lisa in her comatose state. Bart starts crying again and runs over to Lisa and shakes her while screaming her name before being pulled off of her. "I-I'm sorry m-m-mom, d-dad, grandpa, an-.." He can't continue and starts sobbing. He looks at his baby sister who was also crying and gets her to calm down while Homer and Marge go over to their little girl. "Oh sweetie…Please pull through..Please!" She starts tearing up and kisses Lisa on the forehead. Homer brushes her daughters hair as he finally breaks down and sits himself back down. When it's time to leave Bart is the only to stay and won't be moved. "I'm staying! I did this! I'm going to be with her through and through!" The family decides to leave him there and Bart spends the night at the hospital, Bart kisses Lisa on the cheek and tells her goodnight as he goes to bed.

After a visit from both Skinner and Milhouse Bart and Lisa are visited by Marge who brings Maggie with her. "Sweetie, you should be-" "No! M-Mom, I need to be here!" Bart tears up before Marge kisses him on the forehead and sits in a chair next to him. Eventually Homer gets off work and he arrives, Bart apologizes to Homer who surprisingly accepts his apology. Homer kisses his daughter on the cheek and hugs her, "Lisa? Can you hear me?" She doesn't respond and Homer tells her "I love you." Bart goes back up to her and holds her hand, "Lisa, I'm sorry. I-I didn't want this to happen..I just wanted to make people laugh, I-I d-didnt want to hurt you." Bart starts tearing up but he fights it as he says to Lisa, "I love you. I always loved you.. I just didn't show it because I was stupid and now I just want you to wake up!" Bart sobs as the heart monitor goes down and eventually flatlines. "LISA NO!" Bart yells as Homer and Marge cry. "No..No..God please..Please!"Bart buries his head into Lisa chest and starts sobbing, he has to be removed from her corpse as Dr. Hibbert pulls the sheet over her.