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

Struggling with mysterious symptoms, Mia tries to track down Lorenz, certain that she will be able to provide answers about what's happening.

Mia strikes an uneasy bargain that could help get to the bottom of her missing memories. But upholding her side of the deal means flirting with danger.

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.

As Mia's feelings toward Jasper begin to change, her friends aid her desperate search for information by engaging in some high-tech espionage.

After waking up in class feeling disoriented, Mia grows increasingly distressed when she discovers nothing in her life is how she remembers it.

With time running out, Mia sets a risky plan in motion to uncover the secret lab and find a solution to her rapidly deteriorating neurological state.

Loyalties are tested after Mia locates the red notebook, with lines drawn between the friends amid a last-ditch effort to save her life.

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

Mia's night out with Jasper leads to Dr. Lorenz's private residence, where a medical emergency complicates her plans to access the professor's computer.

As Mia makes a last-ditch effort to obtain proof about Dr. Lorenz's experiments, Jasper begins to unravel over his feelings of betrayal.

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.