A young girl flushes a dead fish down the toilet. She had failed once again to take care of her father's fishes. Scared he'd find out, she replaces him with another one and prepares dinner to distract her father from finding out. Living on the side of the railroad, she waits for her father to come home before the last train passes by. That night, the train arrived before him. 

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A year later,  she finds herself with the last fish in her father's fish tank. Now, with no one to blame her. She decides to go on an adventure to free that last fish.