Detective Michael Bennett joins forces with FBI Agent Beth Peters to root out a terrorist who is threatening New York City with a devastation of the greatest magnitude, and must simultaneously sort out his feelings for Beth and protect his 10 adopted children, all while his relationship with his children's nanny, Mary Catherine, takes an unexpected turn.

When east London is targeted by a bomber, fifteen-year-old Alena, raised by her half-brother and his boyfriend, becomes increasingly rebellious and insistent on learning about her long-dead activist mother.