Alison is the leader of a small group of five girls. She lives a prosperous life, is young and beautiful. The other four members of the group, Spencer, Hannah, Aria, and Emily, surrounded her like stars. After a crazy party, Alison mysteriously disappeared. While the four girls were sad, they were relieved at the same time. Did Alison's "evaporation" mean that everything they had done would be wiped out? The confusion and great suspense of youth come secretly under the bright sunshine of Rosewood Town.