Robin introduces the character of Karen Greene and her Morgan, the lovable, sweet, and somewhat lazy, Robin. Karen is a bit shy, and desperate for friends. When Robin gets a stone bruise and can't be ridden, the inexperienced rider gives in to peer pressure and rides a horse she knows she can't handle. When the horse bolts and Karen is injured, the girl is afraid to ride any horse - even Robin. Her parents decide to move Robin to Gallant Morgans...