So, it's been another Disney movie weekend and it got me thinking.   What if the Princess locked in a tower wasn't as helpless as she might appear.   She could be a powerful wizard who's the focus of an Antimagic Field, which prevents her from using magic to escape.  Combine that with a sturdy door and a possible dragon guardian...and you've got a story.

Possible plot twist: she's actually an evil wizard and all the attempts to rescue her before the PCs came along were members of her cult.   Which the PCs only find out after she's gotten loose.   So, they find themselves being tasked with putting the evil wizard back in her rather comfortable prison.

Why not go all out?

- Rescue dragons from evil princesses!
- Free a stepmother and her innocent children from a stepdaughter-turned-tyrant and her enslaved prince-husband!
- Eliminate the evil druidess and her hopelessly smitten animal companion husband that was priorly a prince!
- The Elven kings have posted bounties targeting a young woman wearing a red hood. Wanted for disrupting the natural balance, hunting down all the wolves in the forest, and various acts of animal cruelty!
- Help in the dwarven revolution! Remove the Witch Queen's yoke from seven million slaves by helping a wizened, desperate enchantress smuggle a poisoned apple onto the tyrant's dinner table!

A princess under high security to protect the world from her rather than vice versa would probably work better as a plot twist than a whole game, unless you did something clever with it like showing there was no danger from, say, a kid with natural necromantic powers until they locked her up and started treating her like a freak. Now she has great cause for vengeance on whichever sibling has been given the throne in her place, and little academic training, so no-one understands the way her powers work.

Two plot ideas in this vein, if this is a real proposal:

1) solo or small group, players are princess and minions (undead pretty birds, mice, things missed by the guards' frantic cleaning) trying to escape and work out how to survive outside without getting busted.

 2) A team of young noblewomen who support the princess and recognise her imprisonment is just bias/high fantasy rich people controlling abuse come to rescue her, provide non-undead friends, and then work out what to do when you hold the "civil war would be twice as disastrous against someone who can reanimate the fallen" card in the game of thrones. Youthful impulsiveness, solidarity with someone picked on for how she was born (beyond the powers, too - I mean, the parents would probably have spared no expense to provide military training and at least enough personal love and care for brainwashing if baby necromancer had been a boy), subversively ditching the "helpless until husband" narrative, heck yeah.

There was an online comic I read once about a girl knight who was going to rescue a princess held by bandits with a dragon and it was a dragon princess being held by bandits.  But I can't remember the name and can't find it on my computer.  Metal passed right through the girl knight for some reason.  Argh, what was that name?

She isn't locked. In fact, she did most of the work to clear the dungeon, the players are fighting the few monsters that did escape her rightful wrath (the bad guys try to steal something from her). The final boss is a younger dragon (level appropriate for the players), while she finished off the much more older one herself.