From Patreon:
It's time for the first Colostle single player guided campaign, 'The Search for the Seastone'! This module is the first part of a guided adventure and story for your character as they follow the rumours of legend to the mysterious Crown Isle, in search of a treasure unlike any other.
This module contains the first part, along with special rules and explanation for how the campaign will work. Parts 2 and 3 will follow in the subsequent months, completing your epic quest. It's up to you when you partake of this adventure and how you sew it into your character's current adventures.