Defense attorney Mickey Haller - The Lincoln Lawyer - is inundated with pleas from prisoners protesting their innocence. With the help of ex-LAPD detective Harry Bosch, they find a needle in the haystack: a possible wrongful conviction. A woman imprisoned for murdering her husband, a sheriff's deputy.

But the evidence doesn't add up, the department pushed for quick closure in the killing of one of its own. But is this rushed justice - or something more sinister? As they face a David versus Goliath court battle, the secrets which could set an innocent woman free could also be worth killing for...