There are many ways to look at disabilities. Ivan the INVACAR is a car that transports his driver Derry, who is in a wheelchair. So, Ivan is an adaptive device to help people with disabilities. However Ivan is also a reluctant superhero who helps those in need: In this third of many adventures, Ivan, using his superpowers and along with his friend, Big Dog, rescue the town from the horrible drought and help Hannah and the Hedge Hogs out of the cave.