Once upon a time, in a big pool, there was a little fish named Fin. Fin loved to play with his friends all day. They would swim and dive in the water. But one day, the water started to taste bitter. Fin and his friends did not like it.
Fin wanted to find out why the water was bitter. He swam and swam, looking for the reason. Along the way, he saw a big rock. Fin thought, "Maybe there is something behind the rock making the water taste bitter." He told his friends about the big rock.
Fin and his friends went to the big rock and worked together to push it. Behind the rock, they found a lot of old leaves making the water taste bitter. They all worked together to clean the leaves. After they were done, they played and dived in the clean water again, and it was not bitter anymore.
