 Triggered by the death of Krusty's father, Lisa becomes obsessed with protecting her own father, Homer, from getting hurt.She wraps him in bubble wrap, which ends up saving his life when Otto's school bus plows into the garden.Eventually Marge and Bart talk some sense into Lisa, that while it is nice of her to be concerned for her father, she should not force Homer to take it easy on himself and just let him live his life.