Well they have this lvl5 1 shot for free as an intro to the kaiden campaign setting. You can dl it here
http://paizo.com/products/btpy8p2y?Frozen-Wind
Stole my suggestion.
But to add to it. The one shot is designed for 5 each, 5th level characters. It runs about 3.5 hours, unless you spend more exploration time in the first act. It's divided into 3 time based acts, and works as kind of sandbox temple layout. It comes with 7 or 8 pregens to choose from, and using the pregens are a good idea as there are specific goals for each NPC provided in each NPC's background.
In the playtest, nobody was killed, but 2 characters were brought down below 0 hp - twice! And a third player started exclaiming "TPK, TPK!" the first time the two were knocked low.
Had I run this one-shot again, I would have given a rejuvination ability to the undead monks of the second act to notch up the terror level and possibly risk a TPK.
Since this was originally a convention demo game held at Origins, there is a score keeping chart to determine a "winner" among the players, but isn't necessary.
Among the pregens is a paladin, the only included "healer" (no clerics) and should be kept that way, even if you don't run the pregens, since this is very much a survival horror scenario. It might be diminished slightly if there are more healer types - so minimize that among the players.
Rite Publishing is working on another awesome horror one-shot that should be released in October, but it's for the patrons of the Kaidan Kickstarter, so it won't be released to the public for a while yet - probably sometime next year.