When Robyn Loxley's life is turned upside down by a police shooting, she turns to her friends, from underground rappers to daring outlaws, to save her mother's life from John Prince and the Sheriff.

After stealing Prince's car and saving her mother from the Sheriff, Robyn hopes the worst is behind her, until the Sheriff shows up in Sherwood under an umbrella of surveillance drones, using them to identify suspects and lock down the community.

Robyn and her friends prepare for Lionheart Day, a festival honoring Sherwood's fallen leader and Little John's mentor; just as Robyn hopes for a return to normal life, Lionheart's killer, the infamous Guy Gisbourne, returns from prison.

When Chet Prince mistreats Alan's friend Elmore, Robyn and The Hood decide to crash his birthday party and steal from the richest playboy in town.

Lionheart Day kicks off with a surprise as John Prince offers to bargain with Tressie over Sherwood's future; while Tressie and Prince negotiate, Robyn starts to suspect things are not what they seem when Guy Gisbourne returns to crash the party.

The sheriff imprisons Robyn and her friends in a black site, determined to uncover The Hood by any means necessary; Prince pressures the mayor; Robyn puts her faith in a dowdy social worker who seems completely out of her depth.

With Prince's purchase of Sherwood complete, the Sheriff gives Robyn and her friends mere hours to evacuate; instead, Robyn joins forces with Tressie, Jill and her neighbors to make a final stand against the Sheriff.