What is a summary of the story the dog and the lion?

In the fable of The Lion and the Mouse, the Mouse accidentally wakes the lion from sleeping. The lion threatens the mouse, but then shows him mercy and lets him go after the Mouse convinces him that he would be unworthy prey for such a great creature as the Lion.

Later, the Lion is captured in a hunter's net. Remembering his mercy and kindness, the Mouse, gnaws through the ropes to free the lion.

The morals of the story are that mercy always has a reward, and that you are never too small to help someone or something greater.