●Hello, Random Descendant●

You may think you’ve inherited my home.
You have not.
My heir is Hero, the best dog in the world. However, he needs a companion and caretaker.
That’s you.
Play puzzles to entertain him, and he’ll bring you presents.

Sincerely,
●Sir Gerald●

You're not the heir, Hero is! And for some reason your job is to keep him happy by playing puzzles.