Since the OP didn't bother to say so, this is an adventure for some RPG called Cresthaven, which appears to be entirely free (as is the adventure itself) and can be found at the link provided. Never heard of it before, but from a brief dip into the rules it looks like generic D&D-like fantasy with some extremely old-fashioned artifacts of the TSR days embedded here and there. My favorite was calling for a designated Caller and Cartographer as though we were back in the 1970s again.
I won't spoil the adventure itself (takes less than half the 24 minutes to read the site claims), but it starts in media res with the party predictably waking up trapped in webs with no memory of how they got like that, with the promise that this big mystery will be resolved over the course of the delve. Spoilers, it is not. Sure, you'll find out who/what did it to you (as if you can't guess). but how they managed to beat the party in the first place, much less why they were left alive, alone, and barely secured at all with all their stolen gear neatly displayed for them to re-equip. You're not even down hp to start, and unless your dice go very badly you will murder everything in the dungeon by the end - so what caused that initial defeat? Unanswered. There's not even a convenient wizard to blame it on.
Also, if you have dreams of exchanging witty banter with cousins of the Mirkwood spiders, forget it. These are boring D&D giant spiders and have less dialog than the scenery.