A demon steals a manuscript from the Cambridge museum, only to be annihilated by her client, new crossroad king Barthamus, who uses it as lure for the Winchesters as it contains a most rare spell to find a nephilim, like Jack. Dean would just kill him, but Sam gets him to accept his deal first, to avoid Asmodeus getting the same offer. Assisted by two lower demons and self-sold soul Alice, they must steal in exchange a trunk for Barthamus from grumpy recluse Luther Shrike, a solitary collector of magical items, who can't be killed on his estate. That proves scary even for them, and gets them to reconsider the deal.
—KGF Vissers