During a Whiton University's pledge week, the carefree partying turns deadly when brutal murders start befalling the students, sending Ellery into a race against time to uncover the truth behind the school's dark secrets and the horrifying meaning of a recurring symbol: a single exclamation mark.
| Actor | Role |
|---|---|
 Lindsay LaVanchyEllery Scott | Ellery Scott |
 Isabella GómezKylie Martinez | Kylie Martinez |
 Froy GutierrezWes Scott | Wes Scott |
 Gattlin GriffithBeau Vaughn | Beau Vaughn |
| SShireen LaiShayleen Zhou | Shayleen Zhou |
 Lochlyn MunroBruce Van Horn | Bruce Van Horn |
 Jon HuertasOfficer Rico Martinez | Officer Rico Martinez |
 Yancy ButlerDetective Sandra Fitzgerald | Detective Sandra Fitzgerald |
| JJames BerardoDylan Davenport | Dylan Davenport |
 Bart JohnsonCoach Miles Cooper | Coach Miles Cooper |
 Patrick WalkerMalik Moore | Malik Moore |
 Kent FaulconChief Adam Tahan | Chief Adam Tahan |
 Mel FairBrett Vaughn | Brett Vaughn |
 Debra De LisoDana Thompson | Dana Thompson |
 Nick BallardTad Rivers | Tad Rivers |
| DDavid M Sandoval Jr.Officer Barham | Officer Barham |
 Shalini BathinaMeera Madan | Meera Madan |
| BBrian FragerOfficer Rummel | Officer Rummel |
 Betsy HumeJean Reeves | Jean Reeves |
| AAdin KolanskyAlvin | Alvin |
 Maxwell HamiltonTyler Harrington | Tyler Harrington |
| AAnthony TaiWPD Officer | WPD Officer |