A 5e adventure for four to five characters of levels 5–7, set on the tropical island of Tumalte. From the frontier settlement of Drobur’s Landing, the characters investigate disturbances, explore the jungle, and follow the Cabal of Arcane Seekers into ancient ruins where an unstable network of planar gates threatens the island. The adventure spans three chapters: Drobur’s Landing, Cliffwatch Hideout, and the Tumaltean Ruins. It includes hex-based jungle exploration, side quests, two major dungeon locations, and a nonlinear final dungeon with puzzles and an Arcane Essence system for restoring and rerouting power. A hidden Portal Countdown lets the threat escalate without creating a hard fail state. Includes an 86-page PDF, settlement and dungeon maps, original creatures and NPCs, and eight magic items. The free Preview & Prologue on the product page includes the complete Storm at Sea opening encounter, adventure hooks, and maps of Tumalte and Drobur’s Landing. Published by Infinite Initiative.