Condemned and left to die, Duchess Selina reflects in her final moments— “What I lacked... was capable allies.” Then, time rewinds. Given a second chance at life, Selina vows to bring down all those who betrayed her in her previous life. Learning from her past, she decides to take in six orphaned children with no place to go— and raise them into the ultimate allies... assassins! But will things go according to plan...!?