Pororo finds a mysterious egg while having fun playing in the woods. He brings it back to his house, but the egg starts to crack and a baby dinosaur comes out. Is it a monster?
Eddy finds an old map. Thinking that the map shows the place where treasures are hidden, Eddy tells Pororo and Crong that he is off on a treasure hunt.
Crong learns about Santa Claus giving presents to good kids on Christmas. Thinking back on the bad things he did to Pororo, Crong starts cleaning the house to be a good boy.
Pororo snatches away Crong's favorite toy with a magnet fishing pole. Amazed by how the magnet attracts iron, Crong takes Loopy's can and Eddy's iron airplane.
Loopy finds out that Crong is hungry when she hears the sound coming from his stomach while listening through a stethoscope. Everybody now thinks that Loopy can find out anything using the stethoscope and confess their wrong doing.
When Pororo gets startled opening a box with a toy bomb, he thinks it as another one of Crong's jokes. Crong says that he didn't do it but Pororo gets really angry.
