What really happened in the village of Herron Mills? The answer lies within the three teenage protagonists of I Killed Zoe Spanos. Unsettled by the weak and inconclusive police evidence in the disappearance and subsequent murder of Zoe Spanos, sceptical Martina Green decides to takes matters into her own hands. Documenting her findings in her podcast Missing Zoe, Martina spearheads her own investigation. In her quest to seek the truth, Martina's own life becomes intertwined with Anna Ciccone, a girl who not only bears an eerie resemblance to Zoe, but who also ends up confessing to her murder.