When King Henry VIII dies, members of his court rally for their share of power, and intend to keep the monarch’s death a secret for as long as they need; but this leaves the royal surgeon with a decaying body that nobody can know of.
The logline seems to describes more of a situation than a plot. Members of the court seem to have a vague goal — to jockey for power in the succession. But the logline focuses on the surgeon who has a no objective goal. Just a dead body.
Whatever the jockeying for influence was, there was no doubt, no question as to the line of succession: Henry VIII had only one male heir and he was crowned the next king, Edward VI, even though he was just a 10 year old kid.
But the boy king died at the age of 15. Then the palace intrigue really got interesting and plots abounded because all the immediate candidates in the line of succession were female, a situation England had never faced before.
I don’t see what the story hook, is here, what dramatic plot arises from the situation of the king’s death.
If the surgeon’s dilemma is for another script, leave it out of this logline. The way this logline is worded makes it seem like a large part of the story will focus on him.
Give us one protagonist that we follow and are rooting for and write the whole logline from their perspective. This will help bring the story together as you will be able to focus on one character’s desires, failings and rivals – goal, arc, and antagonist(s).
The Favourite is a great example of backstabbing, blackmail, etc in an historical film so I would highly recommend watching it. Another great example is The Death of Stalin which deals with a very similar premise albeit in a more modern setting.