Dean and Sam investigate a series of suicides inCalumet City, Illinois. Each of the victims killed themselves shortly after a loved one felt compelled to tell them unpleasant truths. When various women begin baring their souls to Dean, he realizes he is also under the spell. Dean takes advantage of the situation to question Sam about the vampire attack, but Sam says he just froze and is appalled Dean doesn't trust him. They discover the spell is being spread by the goddess of truth,Veritas, who is disguised as a local investigative reporter. When the brothers track Veritas to her lair, she takes them captive. Veritas is shocked to see that Sam is unaffected by her spell and has been lying to Dean all along. The brothers break free and kill her. Sam admits he allowed Dean to get turned. The episode ends on a tense note as Dean beats Sam unconscious.Castiel shows up immediately after Dean mentions a holy weapon, and Dean is angry with him for only answering when it's in his own interest to. He suspects that Sam is possessed by Lucifer, but Castiel says he would have felt if Lucifer had gotten out of his cage. Dean starts to explain what's going on in town, but Castiel disappears before he can finish. He then reappears two seconds later and announces that the Horn of Truth is not causing the disturbance. Before he goes again, he tells Dean that he does want to help with Sam and that he'll make some inquiries. later Castiel shows up at the safehouse and tell bella that sam is in trouble