As the 15th anniversary of a fatal high school shooting approaches, former pupil Diana McFee is haunted by memories of the tragedy. After losing her best friend Maureen in the attack, Diana has been profoundly affected by the incident - her seemingly perfect life shaped by the events of that day.
| Actor | Role |
|---|---|
 Uma ThurmanDiana | Diana |
 Evan Rachel WoodYoung Diana | Young Diana |
 Eva AmurriMaureen | Maureen |
 Gabrielle BrennanEmma McFee | Emma McFee |
 Brett CullenPaul McFee | Paul McFee |
 Oscar IsaacMarcus | Marcus |
 Jack GilpinMr. McClood | Mr. McClood |
 John MagaroMichael Patrick | Michael Patrick |
| NNathalie PauldingAmanda (Teen) | Amanda (Teen) |
 Maggie LaceyAmanda (Adult) | Amanda (Adult) |
 Lynn CohenSister Beatrice | Sister Beatrice |
 Molly PriceDiana's Mother | Diana's Mother |
| OOliver SolomonDetective | Detective |
| AAnna MooreBlonde Student | Blonde Student |
 Isabel KeatingMaureen's Mother | Maureen's Mother |
 Adam Chanler-BeratRyan | Ryan |
 Tanner CohenNate Witt | Nate Witt |
 Sharon WashingtonNurse | Nurse |
 Kia JamDoctor | Doctor |
| JJ.T. ArbogastMale Reporter | Male Reporter |
| JJewel DonohueMother at Shooting | Mother at Shooting |
 Tuck MilliganClinic Doctor | Clinic Doctor |