One day a lion was sleeping in a cave. A mouse was playing nearby. The lion caught hold of the mouse. He became so angry that he wanted to kill the mouse. The mouse became very much frightened. But he did not lose heart. He said to the lion, “O king of the jungle, I am a very tiny creature. I made a big mistake, please forgive me this time. I may be of some help to you any time.” Hearing this the lion smiled and let the mouse go. Days, months and years passed by. One night the mouse heard the roar of a lion. The mouse went to the place from where the sound was coming. Having reached there he saw the lion trapped in a hunter’s net. The net was too strong for the lion to break. The mouse gave his identity and requested him not to make any sound. The mouse began to cut the rope with his sharp teeth. The lion was freed before dawn and expressed his gratitude to the mouse.