Welcome back to Assassins Anonymous, where family is everything and danger lurks around every corner. Assassins Anonymous isn't just a weekly recovery meeting for reformed killers: it's also a family. When Valencia receives troubling news that her brother has gone missing, she wants to rush off to LA to find him. But she can't bring her baby girl, Lucia. Enter the other members of Assassins Anonymous: Mark, Astrid, and Booker, who offer to watch the toddler while she's gone. After all, they're three of the deadliest, most highly skilled people on the planet; what could go wrong? Turns out, a lot. Shortly after Valencia leaves, Mark is summoned to the lair of Zmeya, a Russian mob boss calling in a deadly favor: she wants him to kill Astrid, his protege and friend. Mark refuses, but Zmeya reveals that she knows the identity of Mark's ex-girlfriend . . . and his son. Either Astrid goes, or they do. Meanwhile, Lucia spikes a dangerously high fever, and when Booker and Astrid take her to urgent care, they realize too late, that their fabricated identities are a real liability. Also, they don't know Valencia's last name, let alone Lucia's. They can hardly blame the staff for calling the NYPD. Suddenly the splintered group is on the run from both the Russian mob and the police, dodging bad guys and do-gooders while trying to find refuge in a city full of surveillance cameras: all without killing anyone. That is, until Zmeya captures Sara and Bennett, and Mark is ready to throw his sobriety out the window.