Blake Lively to star in the new female-driven international espionage thriller. 'The Rhythm Section' is a contemporary adaptation of the first of British thriller writer Mark Burnell's 'Stephanie Patrick' series of four novels. Heroine, Stephanie Patrick (Lively) is on a path of self-destruction after the death of her family in an airplane crash, a flight that she was meant to be on. After discovering that the crash was not an accident, her anger awakens a new sense of purpose and she rises to uncover the truth by adapting the identity of an assassin to track down those responsible. The new, and lethal, Stephanie Patrick is on a mission to fill the void between what she knows and what she is told.