From the back cover:
Return to the Dread Sea
The Sea of Dread - these dark tempestuous waters loom off the southern coast of Brun, a raging force of nature that has shaped many of the nations in the Known World. Many of us have set sail upon these waters before, featured in adventure modules from X1 - The Isle of Dread, XSOLO - Lathan’s Gold, X7 - The War Rafts of Kron, and many more.
These waters are the birthplace for seafaring nations, Merchant Princes, empires, and pirates. Throughout time refugees have sought succor on the islands that dot its surface, tyrants have sailed armies across its waters, and adventurers have attempted to plumb its depths for treasure - sometimes to disastrous consequences.
The fourth issue of Threshold the Mystara Magazine yet pursues the deep, dark, waters off the the southern coast of Brun... Throw caution to the wind and set sail, as we once again Return to the Sea of Dread.