In terms of content, if you’re deliberately writing a modern twist on Hamlet, more specific details of your setting are needed to help sell it – “laid back” doesn’t really give a clear description of the protagonist. Is he a college student? Does he work a dead-end job? Is he in a band? And King of what?

In terms of structure, there is a passiveness to your logline which makes it a bit dry. Perhaps?something like this would spruce it up? “After the murder of his father, a young prince must?return home to confront his power-hungry uncle?and?take his rightful place as king.” It still isn’t great but it is slightly less wordy with more immediate action.