Priestesses from the Soldats arrive at the manor to praise Altena for orchestrating the Grand Retour. Chloe savors her time with Kirika as they don their ritual garb and practice fighting in the ruins.
A Soldats agent approaches Mireille with a mission to stop the Grand Retour: kill either Chloe or her old partner, and eliminate Altena - the zealot behind the ritual. Meanwhile, Kirika is greeted at the manor by another woman from her past.
Kirika collapses at the edge of a village and is taken in by an old couple who have been expecting her. There she learns about an ancient ritual, the Grand Retour, of which she is an essential part - and a threat to certain factions of the Soldats.
Kirika's final guidance - in the form of a bullet - brings a rush of painful memories. Mireille finally learns the connection to their past, but fails to follow through with her original promise to kill Kirika.
Mireille and Kirika fly to Austria on a hunt for the ancient manuscript that could solve the mystery of the Soldats, but they run into a familiar face - someone who suddenly has her finger over the trigger to set off Kirika's memory.
An agitated Mireille banishes her partner from her sight at gunpoint. After receiving inside information on Chloe's motives, Kirika is warned of a trap set for her troubled friend - will she make the choice to save Mireille despite their confrontation?
Chloe is charged with killing a retired German general who was involved in covert operations with the Soldats during the Cold War. But when her task is interrupted by sabotage, it's clear that she isn't his only enemy.
Amongst ancient ruins on the coast of Sicily, a kiss of death forces Mireille to quell her terror or die at the hands of the Intoccabile, while a severely injured Kirika battles the two Mafioso she missed last time.
After killing a crime boss in New York for an old document, Mireille and Kirika find themselves on the Mafia's radar. A woman from Mireille's past is called out of exile to destroy the troublesome pair.
When Kirika is shot and abducted during an assignment in the Middle East, Mireille faces the facts - and several dangerous rebels - when she realizes she must save her partner or lose her only link to the Soldats.
In the country of Ulgia, Kirika and Mireille hunt down members of a faction that sabotages unstable countries. A hitch in mission arises at the Noir hideout when they have an unexpected visit from the Ulgian army.