In 1649, 59 people sign King Charles I's death warrant and he is publicly beheaded. But his eldest son - and heir to the throne - seeks revenge.
When Charles faces backlash for his treatment of the regicides, his enemies rally against him. Meanwhile, he himself becomes more obsessed with power.
Charles dispatches assassins to Europe in an attempt to stamp his power abroad, but his authority begins to unravel at home as his Queen publicly challenges him.
