World breaker is a campaign built around the strange fascinations that can only plague a modern world. This overarching story is divided into six sections.
From the book's introduction:
Into the Basement: This prologue introduces the global plot and allows players to choose which of four episodes they investigate first. Each of the first four mysteries includes not only the clues needed to solve the immediate case, but also pipe clues affecting the outcome of the final mystery in Swallowed.
Coulrophobia: A global fad in which pranksters pose as sinister clowns takes on an Esoterror cast when unlucky drivers who see them start losing control and crashing. With incidents popping up all over, how does the team find and destroy the cell at the root of the scheme?
Geoslashers: The camera vehicles used to create street views for the Internet’s top mapping site happen upon a series of murder scenes. Though apparently unconnected at first, the incidents spark international unease as the string of supposed coincidences wears on. Can the team suss out the hidden unity behind the killings?
New Crystal Maiden: Worldwide exposure to Outer Dark phenomena threatens when a reality TV show decides to send spelunkers into a newly discovered deep complex near Belize’s famed Actun Tunichil Muknal caves. Agents infiltrate the cast and crew to squelch whatever lurks below.
Heart of Outer Darkness: The team follows the trail of a woman possessed by a parasitic ODE to the unrecognized Eastern European nation of Transnistria. Her deal to purchase arms from a local weapons magnate takes them to Liberia, and then to Nigeria, and finally into the maddening grip of a Mystery Man. Stakes don’t get higher than an Esoterror effort to equip the fanatic terrorist sect of Boko Haram with Ebola grenades.
Swallowed: The disappearance of a jumbo jet over the Pacific becomes international news, inspiring all sorts of nutjob conspiracy theories. The team must take what it’s learned from the previous scenarios to locate the uncharted island where an enormous Outer Dark Entity is aborning. When its spawning is complete, its birth will destroy the membrane forever. Can they destroy it before it consumes the last of the passengers, becoming unstoppable and ending life as we know it?