The adventures of two unlikely friends. Big and Small each have four of their favourite biscuits. Small is shocked when Big eats all of his in one big bite; Small prefers to eat each one very, very slowly. Through the rest of the day, Small munches his second and then his third biscuit with extended enjoyment - not realising that he is making Big feel very hungry. That night, Big goes into the kitchen to find a snack. The fridge is empty but sitting on a plate is Small's last biscuit. Big smells it and holds it and then, before he really knows what he's doing, eats the biscuit. Immediately, he is shocked and guilty: he ate Small's last biscuit! Small appears and Big tells him what happened. Small, too, is shocked at what Big has done - but then reveals that he had planned to give his last biscuit to Big because he was feeling sorry for Big as he hadn't had a cookie all day long.