The party finally arrive at Castle Purgatory, ready to pass on to the Second Circle of Hell. Unfortunately, the prince has withheld some rather key information, primarily that the lich is sealed in a divinely warded room to prevent him from being killed by another demon or undead. Thankfully, Caliban can make infiltrating the demon part of the castle a bit easier, if the party can get him to his throne room, where he can channel the power of the First Circle to secure the castle. Perhaps unsurprisingly, the party doesn't trust him and make other plans.