 The lives of Homer, Lisa and Bart have been split up in a less-than-ordinary day, and as each of their problems unfold, their lives intertwine on a road of chaos and mayhem all over Springfield. Homer s thumb is accidentally sliced off, and he tries to find a way to the hospital; Lisa must find a way to get to the Science fair at school; and Bart and Milhouse discover more than just fireworks in a secret cave...