I'm sure at least some of you have been there. You have an established group, it has jelled, the session is tomorrow, you are short on time to bring the new player up to speed. If you're anything like autistic me, you WANT the story to feel organic, so motivations and plots line up smoothely, but this is also about having FUN together, so saying no to a player to join immediately might lose the player.
How do you handle that onboarding?