 There is increased vigilance at school after police alter them to the presence of a man following girls in the area. Trisha and Cathy are given a parcel to post, and have seemingly forgotten the warning, and separate to go home. Cathy is being stalked, becomes aware of this, and makes a run for it. In the meantime, her sister, worried after not finding her at school, involves Mr. Mitchell, and a chase follows in a police car. But is the stalker all he appears to be?