Martin R.R. George, a Westerosi author, decides to write a fantasy book series on his kingdom of England.
In this book, he creates the character of Sir Gawain, a noble and mighty knight—a champion of chivalry, loyalty, and love. After Sir Gawain's tale has been published, it attracts the attention of King Arthur, and the knight is summoned to Camelot.

There are several challenges that Sir Gawain faces as he travels to meet King Arthur. One of these challenges is crossing a treacherous body of water
He employs the help of a few friends and starts writing, but everything comes to a halt when the political landscape of England changes in 1485. George must adapt his stories to fit the new regime, leading to tense discussions on the changing of the narrative to keep it historically accurate.

Directed by Marc Munden, "The Serpent's Sire" is an imaginative and intriguing exploration of the intersection of historical fact and fiction, as well