Comfortably retired to his home at Chartwell, Churchill plans to live out his days in peace, in the company of his butterflies – if his attendants would just leave him alone.

But it isn't simply Lepidoptera breeding in the gardens, as a far more sinister species is about to emerge from its cocoon – and is ready to feast on something more than just the shrubberies.

Surrounded on all sides, the former Prime Minister must put a life's worth of experience into action in order to win the day. Can his new nurse Lily Arwell offer her assistance?