Christine and Danelle have been best friends forever, a relationship as seemingly infinite as the glow-in-the-dark stars they have affixed to their bedroom ceilings. Lately, though, the girls have been drifting apart, as Danelle's quirky moods turn into wild and reckless acts. At first Christine wonders if her friend is on drugs, but what kind of drugs make you climb a rooftop one moment and send you into the depths of despair the next? The truth behind Danelle's ups and downs is far more complex and dangerous than Christine ever could have anticipated.