“The Rhythm Section” (** out of four) was a languid melodrama about a drug-addicted prostitute (Blake Lively) who cleans up and gets her life together upon finding out that the plane crash that killed her family years earlier was a terrorist attack and she meets with a British secret agent (Jude Law) who trains her for orchestrating her revenge. Lively is good in an almost unrecognizable role and film holds you initially with its downbeat mood and style but film utterly lacks any momentum and starts to become tedious after a while. Incidentally, this made history as having the worst wide-opening of any film release in theaters last weekend.