When two babies die of a mysterious infection in the Paediatric ICU, Allen scrambles to find patient zero before Bethune General suffers a full-blown outbreak.

Bruno shocks everyone by making an obscure diagnosis that saves a patient’s life, and a momentous secret from his past is revealed. After being kicked by a patient, Sandy calls Melissa for help instead of Brian.

Griffin starts to spin out of control after a harrowing car accident evokes a traumatic event from his past and Bruno gives Mel some vital tips on purse string suturing.