Instead of going by the usual 2 hour duration, the film manages to put fear as well as alert us in 90 minutes. This deserves special mention.

Tamilian couple Prasanna and Sneha live in the US. They have a daughter. When Prasanna is not home, a stranger observes the house and this puts fear not only into Sneha but into the viewers as well. She tells her husband of this but he brushes it away as just a figment of her imagination. 

One day, Prasanna sees a masked man trying to enter his house and now he feels the first pangs of fear. Prasanna gets totally confused as to who the person could be and later realizes it's like inviting trouble when trouble is passing one by. More than the suspense of the masked stranger's identity, it's the message conveyed that really moves the viewer.

Director Arun Vaidyanathan has tried to convey that pedophilia has increased world wide and according a survey, it is most in India. This is indeed a matter of concern.

The director must be credited for eliciting natural acting from Prasanna and Sneha as a married couple. Since villain John Shea as the child kidnapper has no resemblance to Tamil screen villains, it is easy to relate to him on screen.

This is the first Tamil film to be shot on Red One Camera that shows things as it is. Since even the original color tone gets registered, it is like watching the real scenes.

It's a consolation that there is no kuthu song or flying fights. If the 2 unconnected songs are edited out, it would do no harm.

'Achamundu Achamundu' speaks of fearful things and puts a scare into you.