From publisher blurb: When someone steals your sun and takes it to another dimension, you have to give chase. A Numenera adventure for all tiers. The Sun Below has been stolen. Most of thieves are gone, but the PCs find one of the thieves' transdimensional ships, the Gravitas Mislaid, has tarried. It's possible for the PCs to get aboard and follow the other thieves to where the Sun Below was taken. Once aboard, the explorers find the ship contains three different planes of existence, a new spin on the term three dimensional. There they can deal with transdimensional pirates, horrific creatures, a squid headed woman with her own agenda, and maybe even meet an old friend. The Gravitas Mislaid docks at the City of Lost Worlds. This transdimensional nexus is run by the Terrible Beauties, the very god-like beings who stole the Sun Below. This city is the perfect sandbox for your players to explore as they figure out how to get to the vault that contains their sun. Enemies, allies, and many shades of gray populate this multi-planar city. Your PCs may visit a virtual hell to speak with a dead criminal, dine in luxury under a toxic atmosphere to gather information, and gain unlikely allies in their quest. The Terrible Beauties have a bit of a sun-vault, in a pocket (a very big pocket) dimension known as the Saturated Sanctum. Getting in is just the beginning. For then the PCs must hijack a giant automaton which can rescue their sun. This adventure is designed for all kinds of players. If your players want to fight things, they can. If they want to talk their way out of problems, they can. If they want to sneak past problems, they can. No matter what path they take, there will be plenty of content left over for your own adventures. The City of Lost Worlds is a great place to visit whenever your players go transdimensional. Players can choose a new race, the four-armed vikrons from a high-energy dimension and gain abilities from a new flavor, the dimension walker. Not to mention a huge bestiary, a big cast of fleshed out NPCs, new equipment, cyphers, and artifacts.