Julia and Sienna Larkin are sisters-in-law, connected by Julia's husband and Sienna's brother, Jason. Recently, Jason has been putting in long hours to secure a promotion at work, so when his boss is found brutally murdered the Larkins are shocked and unsettled. A few days later, Julia and Sienna's lives are upended when Jason gets into a car accident and is placed in a medically induced coma. Worse, the police arrive with news that he's the prime suspect in the murder investigation. Sienna staunchly maintains her brother's innocence, but as their investigation uncovers a complicated web of secrets, Julia is less sure she's willing to defend her husband.