Sejak kedatangannya di istana Buckingham, Rex menjalani kehidupan mewah. Top dog, ia telah menggantikan tiga rekan Corgisnya di hati Yang Mulia. Kesombongannya bisa sangat menjengkelkan. Ketika dia menyebabkan insiden diplomatik saat jamuan makan malam resmi dengan Presiden Amerika Serikat, dia menjadi malu. Dikhianati oleh salah satu rekannya, Rex menjadi seekor anjing liar di jalanan London. Bagaimana dia bisa menebus dirinya sendiri? Dalam cinta, ia akan menemukan sumber daya untuk melampaui dirinya dalam menghadapi bahaya besar …
Since his arrival at Buckingham palace, Rex lives a life of luxury. Top dog, he has superseded his three fellow Corgis in Her Majesty’s heart. His arrogance can be quite irritating. When he causes a diplomatic incident during an official dinner with the President of the United States, he falls into disgrace. Betrayed by one of his peers, Rex becomes a stray dog in the streets of London. How can he redeem himself? In love, he will find the resources to surpass himself in the face of great danger…