D&D One Shot

The characters are despised fiend hunters who must secure a ceremonial necklace. Two of the characters are former friends.
It is at a magnificent hospice which has a market that occurs every 3 days.
There are ogres following a map. And a friendly scholar seeks to ransack an elemental ranch.
At some point a door opens.
As the adventure progresses people start breaking into song

The PCs are famous half-elves who must steal something from a wealthy stepping stones. One or more characters is currently cursed. It might involve gnomes.
There is a popular apprentice who works against them.
The characters start with an escaped beast. At some point they encounter an annoying trap. If things slow down one of their allies tries to leave.
Afterwards there is a reward of shares in a mine.

The PCs are cursed sages who must capture a reclusive mage. One or more characters has an inquisitive mount. The mood might be... tense
There is a heartbroken necromancer who falls in love with a character. they grew up with a character.
The characters start with an escaped monster. Early on there is a wedding. If things get stuck an ally turns up with useful information.
Afterwards there is a reward of the satisfaction of a job well done.

The PCs are dramatic entertainers who must map out a sacred planar fortress. It might involve skeletons.
There is a drunk politician who comes with them. they worked together with a character.
The characters start during a heist. At some point they spot foes who are unaware of them. If things are going nowhere it starts to rain.
It finishes with a religious ritual.

The characters are heroic monster hunters who must capture a honorable halfling zombie.
It is at a ghostly stone circle which is associated with a cruel titan.
There are a group of hungry locals deeply unhappy. And a scout seeks to stop a portal opening at midnight.
At some point there is a explosion.
As the adventure progresses people fall ill