Once upon a time,

There was a dog named Rex...

Rex and his owner were taking a stroll through the park.

But in that day, Rex``s owner got hit by a car.

????

With no one to take care of him he had to go live in the streets. Rex thought about all that he lost and decided to do something about it.

On his journey he finds the true value of a proper life and feels uncontent with his current life. He wants to change this.