Once the king's favorite Corgi named Rex fell behind on the streets of London from his mistress and lost. By chance he gets in a dog fight club, where there is cruel laws, a different four-legged species defend their place under the sun by force. Now Rex, to return to the Royal castle, will have to overcome many difficult tests. But this adventurous journey home will help him not only to understand himself and understand what he is worth, but also to find true love.