The third season of the award-winning drama continues the story of two women with brutal pasts, addicted to each other but now trying desperately to live their lives without their drug of choice. For Villanelle, the assassin without a job, Eve is dead. For Eve, the ex-MI6 operative hiding in plain sight, Villanelle will never find her. All seems fine until a shocking and personal death sets them on a collision course yet again. The journey back to each other will cost both of them friends, family, and allegiances... and perhaps a share of their souls.

Eve is attempting to rebuild her life, having been shot by Villanelle. Villanelle is also moving on, until she is approached by an old foe. Carolyn is being undermined at work and Kenny can't leave his own investigation into The Twelve alone.

Eve and Carolyn are reeling. Eve strikes up an unlikely alliance with Kenny's colleagues at the Bitter Pill. Villanelle finds that management isn't all it's cracked up to be.

Villanelle agrees to a job which will take her back to London; Carolyn's Moscow contacts come in use when Eve and the Bitter Pill team unravel a potential lead to The Twelve; Konstantin finds himself under pressure from all sides.

Villanelle receives good news about her upcoming promotion but can't shake the feeling that there's still something missing from her life. Dasha seeks a solution to Villanelle's erratic behavior.

Villanelle returns home to Mother Russia to try to find her family. Perhaps a new connection to her roots will give her back what's been missing in her life.

Carolyn finds out information is being withheld by those close to her. Eve finds a lead on Villanelle. Meanwhile, Villanelle has had enough and decides on a different path. Konstantin's loyalties are split.

Eve finds a clue to Villanelle's whereabouts in the most unlikely of places, Villanelle and Dasha work together on a hug, and the pressure is getting to Konstantin.

Konstantin makes a break for it. Carolyn might have finally found what she's looking for. Eve and Villanelle try to work out what the future may hold for them.