Summary of Plot. Molly Barnes is taking a Saturday computer programming course offered to junior high students at Collier College, as are two fellow students and veteran programmers, Brian Regan and Allen Yeager. Brian learns that his intelligent but impulsive friend Allen has been hacking at the time-sharing system of a nearby university used by the college and has gotten into some files that he assumes belong to a museum. With mischievous but good intentions, he added the name of a local art collector, a Mrs. Fairchild, to the list, only to find out from Brian and Molly that she, coincidentally, was just robbed of a painting. The eccentric Mrs. Fairchild, a former actress, tells Molly that her husband, a retired engineer, interested in ar...