Twenty-nine-year-old Lisa Newberry can barely make it through the day. Suddenly widowed and a survivor of a near-fatal attack, she is wracked with grief and despair. Then she hears of a medical trial for a tiny brain chip that emits electrical pulses to heal severe depression. At rope’s end, Lisa offers herself as a candidate.

When she receives her letter of acceptance for the trial, Lisa is at first hopeful. But—brain surgery. Can she really go through with that? What if she receives only the placebo? What if something far worse goes wrong?