Adventure description from front page "Stuck on the blue waters of the Azure Sea; stranded in the calms; a simple sail he said, ferrying goods from Hardby to Marner. Anything can happen on the deep blue waters of the Azure. A two-round continuous play adventure for characters level 4 - 12. Written for Suel human characters but surivible by all."
Players are recommended to have played this module before they participate in COR4-11: Crimson Thorns.
"COR4-11 Crimson Thorns" is described as the first module in a series called "Frozen Blood Saga", so this module is a sort of prequel to the series.