At least nine sunsets away, there is a place where dogs can do what they want. They drive cars. They throw birthday parties. They live the good life. But they are not all the same, and when a special one has the courage to fly and leave the confines of his dog town, he encounters danger and challenges beyond the tenth horizon. Only when he makes a remarkable discovery will he be forced to choose between friendship and adventure. Will he remain loyal to his new discovery?