David Morrissey (The Walking Dead) and Kelly Reilly (True Detective) star in an epic and cinematic new ten-part drama from award-winning writer Jez Butterworth (Spectre, Jerusalem). Sky’s most ambitious drama ever, it’s packed with action and emotion and is produced by Vertigo Films (Bronson, Monsters) and Neal Street Productions (Penny Dreadful, Call the Midwife).Set in 43AD, when Britannia was a country ruled by powerful Druids and warrior queens, it follows the reluctant rise to power of Kerra (Reilly), the daughter of the King of the Cantii. When the Romans invade Britannia, she and her arch-rival Queen Antedia (Zoe Wanamaker) are forced to put their differences aside to face their invaders. Meanwhile, rogue Druid Divis (Nikolaj Lie Kaas), the only one who foresaw the Roman invasion, finds an unlikely ally in 12-year-old Cantii girl Cait (Eleanor Worthington Cox) in his quest to defeat Rome.The Romans are led by General Aulus Plautius (Morrissey), who is determined to succeed where Julius Caesar failed and conquer this mythical land at the far edge of the Roman Empire. He is a strong and resilient leader, however, he is harbouring a deep secret. During the series, he will have to take on the dangerous Celts, hold together his fearful and reluctant army, and confront his own personal demons. As tribes and Druids unite to fight the Romans, Kerra is thrust into the most important role of her life as she spearheads the resistance against the might of the Roman army. Also starring: Hugo Speer, Annabel Scholey, Julian Rhind-Tutt, Ian McDiarmid and Stanley Weber.