Showdown At Sully's is centered around five unsuspecting individuals who discover they are being held captive by an ambitious wizard named Obbidicus Zorn, as a ploy to acquire additional magic from Sara Richards, whose dormant sorceress abilities Zorn has awakened and intends to use to further his long range plans toward world conquest by inciting a dimensional war between Earth and the planet he hails from Tolaan. Their only possible means of escape is to resist Zorn long enough for him to eventually exhaust a substantial amount of his magic, bringing about a test of wills, culminating in psychological warfare.