Misfortune Hunters

S1 E17: Betty begins to mysteriously receive fortune cookies that instruct her to carry out simple good deeds - each of which leads to a reward. Little does she know that she is being set up by two evil treasure hunters who need her pureness of heart to enter a cursed tomb. Archie and the gang must track down the Tomb Raiders before they get away with the treasure, and defeat the evil demon that they released. Ultimately, Betty learns to believe in her goodness, because that is what finally enables them to force the demon back to its tomb.