He's a fast-talking little fish who finds himself in hot water when everyone thinks he's a hero. At first, his fellow fish swallow Oscar's story hook, line and sinker and he's showered with fame and fortune. It's all going along swimmingly, until it starts to become clear that Oscar's tale about being a great hero sounds a little fishy. Now Oscar has to tread water until he can get the scales to tip back in his favor again.