This is a Norse (Thor) scenario. The map is quite detailed, and there are many triggers. The .zip file includes the scenario files, an AI file, and a Readme file.
You begin in a decimated town near Mount Gurnin, which has just erupted and destroyed your village. Collect your refugees and find assistance from your allies. The creek can no longer be forded because of the spring thaw, so you'll have to build transports and sail across to find your revenge.
Please take the time to read the Readme file, as it includes all applicable details.