A little girl called Tina and her dog, Pongo, live in a tree house. On a hot lazy day, they see a butterfly, which they name Trouble and follow her to the lake. There they find a crocodile who doesn't want to eat them but instead, needs their help as he is hurt. He was curious and stepped on broken glass, which was shining. Against Tina's better judgment, she helps the crocodile and removes the glass. She is shaking, a not so happy Pongo is watching, and Trouble is also not far away. She understands the importance of not throwing rubbish as it can affect others, and the crocodile promises that no crocodile will ever harm her or Pongo so they will always be able to play by the lake. Tina and Pongo happily return home after saying good-bye to a thankful crocodile and get a kiss from Trouble.