After meeting her unconventional roommates, Mia attends her first class with Dr. Lorenz and cozies up to the professor's research assistant, Jasper.

Mia tries to wheedle her way into a job at Dr. Lorenz's biomedical institute but runs into a problem when she's asked to participate in a genetic study.

Dr. Lorenz's growing suspicions cause Jasper to question his relationship with Mia, who finds a new confidante in her desperate search for answers.

On the run and with time running out, Mia turns to her friends for help in a life-and-death race to save the train's passengers.