twist, reversal, peripety
the inversion from one state of affairs to its opposite. For example, an action seems destined for success but suddenly moves toward failure, or vice versa. According to Aristotle, peripety is, along , a sudden reversal of a character's circumstances and fortunes. (Baldick, 2001, p. 189) [As a plot point a] twist is surprising, yet explainable and motivated change in the direction of the action. (In