Hanna (Saoirse Ronan) is a 16 year old who's been trained as a ruthless assassin all her life isolated from civilisation by her father, Erik (Eric Bana), while the rest of her ilk were probably into grooming dolls and brawling in the 'Jacob Vs Edward' debate. Her life in the cold, barren, desolate regions of Finland involves an arduous training regime which you know will be put to use for a specific purpose later. Soon shes in the clutches of the C.I.A. who are actually tricked into capturing her and when she wreaks havoc in her holding facility killing more than a few agents during her escape, she truly has the attention of Marissa Wiegler (Cate Blanchett), a shady CIA operative. Marissa's pursuit of Hanna then forms the crux of the tale, while Hanna's interaction with a family on route to Berlin gives her a different human perspective on things she lacked in her isolated upbringing.
One of the main plot points in the film is the identity of Hanna and why Erik chooses to keep her isolated, training her for a specific mission in mind. This keeps you hooked on throughout and the reveal though a little out there almost Jason Bourne like is credible enough. Hanna's learning experience with the family she hitchhikes with and particularly with their young daughter is mostly played up for laughs but has a few poignant moments.
The action moves at a dazzling speed and will remind you of the Bourne series, its energy is a lot of fun to behold. The background score by the Chemical Brothers with all the thumping, funky tunes gives the movie a unique flavour and vigour. The cinematography is quite adept at capturing the mood of the scenes.
The acting is uniformly good even if I found Eric Bana's ridiculous accent hilarious. Tom Hollander particularly is enjoyable as a gun for hire and he too seems to be relishing the role with utmost delight.
An array of dazzling action sequences with a plot that keeps you on your toes and a great background score make Hanna one hell of a thrill ride.