Adventure Avenue: Raiders of the Dark Spire

From publisher blurb: A Porphyran adventure set in the Haunted Sea for four characters of 10th level. Ice giants are on the march. Villages have been razed, with only scant few survivors left alive. Reports from these survivors tell me that the perpetrators are blue-skinned giants of some sort and loot and pillage indiscriminately. They go for the portable riches, but they seem to dedicate a lot of time to gathering food and kidnapping villagers as well. Can the PCs stop the Dark Spire raiders from consuming the Haunted Sea in their blood reign?