Paramedic Linh is gearing up for a crucial emergency surgery exam but struggles with mastering CPR. Seeking help, he turns to his roommate Huy, a fellow medical student, for a hands-on demonstration. However, the practice session takes a perilous twist when Linh accidentally uses a defibrillator at high intensity, causing Huy’s heart to stop. Now, Linh faces a real-life emergency, racing against time to perform CPR and save his friend’s life.