The characters are Tito and Bimbo and they live in Pompeii. Tito is a blind boy and Bimbo is a dog.
Tito uses his nose and ears to help him navigate and Bimbo stays by his side. Bimbo always takes care of Tito and gets him food.
Tito and Bimbo run into people arguing about Mt. Vesuvius. Someone said the smoke column above the volcano is higher than it usually is.
The next day the air is hot and Bimbo was more active than usual. It was hard to breath for Tito.
The volcano Mt. Vesuvius erupts and the people of Pompeii are trying to leave and get out alive. Bimbo leads Tito to the sea where there are boats and Tito keeps falling and Bimbo is doing the best he can to get Tito to safety.
Tito is knocked out and Bimbo drags him to the beach where people took him on a boat and saved him. Bimbo went back to the city to find food for when Tito wakes up but he dies while trying to get out of the city.