Plot
Former FinCEN director Raymond King meets with the mysterious assassin Anaïs to ask her help locating a Salvadorean family, offering only a dated photo of the parents and their young son. Anaïs does not respond to the offer but warns King he has been followed. King is killed in the ensuing gunfight while Anaïs walks away unscathed. King's protégé and current deputy director of FinCEN, Marybeth Medina, identifies his body, sees "find the accountant" written on his arm, and decides to take up the case.
Medina, despite being mistrustful of Christian Wolff's illegal activities, asks him for help finding the family in the photo. Wolff organizes a collage of information which shows that the family in the photo fled from El Salvador to Los Angeles, encountering various hazards along the way. Cobb, the man tasked with killing Anaïs and King, informs his supervisor Burke, who tells him to continue pursuing Anaïs, lest she realize what Burke did to her.
Christian invites his estranged brother, Braxton, still an assassin, to help with the case. Justine, still residing at the New Hampshire compound where she met Christian, works with a group of autistic children to hack into different technologies to help Christian. Their group finds a photo of Anaïs but are unable to identify her. Uncomfortable with their illegal methods, Medina breaks from the group. She visits a hospital mentioned in one of King's reports, where she discovers Anaïs is the mother from the photo. Anaïs was earlier involved in a car accident, causing brain damage, loss of memory and acquired savant syndrome, which includes intense combat skills.
Batu, a contractor for hitmen, sets a contract for Medina which Braxton rejects. Wolff later sees the message on Braxton's phone, realizes there is a hit on Medina and arrives after she has been wounded by Anaïs. At Medina's, Anaïs sees the old photo of her family and regains some of her memories, discovering that Burke was the one who had imprisoned her and murdered her husband in Juarez.
Braxton and Christian realize that Anaïs's still-living, autistic son Alberto is being held captive at a prison camp in Juarez with other children of trafficking victims, separated from their families. They assault the compound and save Alberto and the rest of the children after killing Cobb and the other guards. Justine blackmails Batu into canceling his contract on Medina. Justine tips off Anaïs to Burke's hiding spot in Costa Rica and she kills him. Justine and the gifted children prepare to welcome Alberto to their facility in New Hampshire, and Braxton and Christian discuss going on a brotherly hiking trip in Chattahoochee.
