Thoroughbreds may seem like a typical thriller about getting away with murder, but it is much more than it appears to be. This feature is part thriller, part black comedy, and part drama about two opposite teenagers who are old friends but begin to fully understand each other's lives for the very first time. Anya Taylor-Joy portrays Lily Reynolds, a high school student who has a tutoring session with her old friend Amanda (Olivia Cooke), giving them both a chance to spend time together and catch up after the death of Lily's father.