I teach at a high school, and we have a tabletop games club. I'm working on developing a one shot with a student in order to get some of the other kids off of pathfinder and hooked on dnd5e. Any ideas for a premise or where to start?
My go to for fresh faces:
If you don't know how they play and/or they aren't sure what they want to play I suggest a carnival/circus with all applicable games like wrestling, archery, axe throwing etc, have a traveling library boasting rare books, basically anything each base class would find interesting. If a player wants to steal something, have a thief bump into one of them and steal their money. Describe some one as an easy mark, if they get away with it nothing more happens, if they are caught have another player character catch them and have them resolve it on their own with a few nudges as needed. Just really set the scene and the players will gravitate to what they find interesting, make note of all their actions and use that to determine their starting alignment/class etc.
Part two is "haunted" mansion the player hear about this abandoned mansion in the wood somewhere, few ways to get the hooks going is they can hear about it by walking into a room and have a guy looking to hire folks to clear it out and share the profits which is the easiest way but that might lead to no one being interested. Another way is lets say they catch a thief and want to bring him to the constable or whatever, they could run into a frustrated man asking the local law for help and them ignoring him, he can say things like a ghost has my wife or something equally crazy. Or just have a help wanted ad somewhere. They will need at the very least an empty wagon to haul back the loot.
Anything to get them on the path to the mansion, on the way to the mansion they are ambushed by bandits or maybe undead. Either way have the mansion obviously be their home base, but make it empty except for strange noises, stuff disappearing that was just there, knives or forks stinking into the door/wall where they were just standing etc. Make the place seem haunted but also explainable if a master thief was stalking around them as well, have them discover the true nature of the house and fight some more mobs like bandits or undead, make them feel safe and as night falls and they are leaving they catch a blue glow from upstairs bedroom. Again make it empty, have them search the room and find a ring(up to you if magical or not) but when they pick it up all the doors/windows magically seal them in and a very slow moving(immune to physical damage and heavy magic resists as well) wraith/specter appears you want it to glide towards whomever has the ring, moving through any object with ease. This specter on touch deals con dmg and ages you a % of life based on race. Con dmg is hilarious and so much worse than HP damage. Have a few solutions to the puzzle, one being destroy the ring, maybe have a
Bed warmer - Wikipedia, the free encyclopediasomewhere they can use to melt the ring, if there is a fire place and they manage to get it lite have the ring take a few rounds to melt. Adjust as needed to make it feel dangerous but not hopeless, if they solve the puzzle super quickly and destroy the ring with no one taking any hits make the spectre/wraith an abomination now set free and very real. It can pounce on someone immediately and do a bunch of damage, or have something gross happen like lots of appendages reach out and grip/grapple/push everyone around, maybe out a window, through a wall etc. This will give them an exit/chance to flee, if they do flee have the house eat itself and disappear. Since it is a one off and depending on how you feel they will take it you can kill them all if they don't flee/solve the puzzle.
This sets a bar of yes I will kill you, don't be stupid. I left a lot of it as vague as possible so you can add the stuff you want, just don't over prepare, first game focus on description of things and let them for the most part move the story a long.
Also always reward 20's on any kind of skill checks.