An assassin hired by means of text messages to kill a prominent mobster discovers he has been set up by the daughter of one of his father?s hits in a complex scheme of revenge.

I think you could you definitely lose the fact that he learns of his hits via text message -- it's pretty much superfluous and losing it would drop your word count from 38 words to 33...

Your film sounds interesting though -- except I'm losing count of the loglines posted on this site involving 'hit-men' -- definitely the flavor of the month!

Your scenario -- in regards to having what is essentially a sympathetic antagonist (which is what the woman is reading like to me...) is reminiscent of 'Zero Effect' with Bill Pullman and Ben Stiller -- well worth a watch/ read...

Anyway -- given your edit I think you could get away with this:

A meticulous (or promiscuous..?) hitman unwittingly becomes a tool in a complex scheme of revenge by a woman he regards as nothing more than a one night stand

Much Luck, again ;)

I agree -- text messages or not, it isn't all that important. I posted a new version literally minutes ago that echos what you have suggested.

"When a meticulous hitman is hired to kill a prominent mobster by means of text messages, he unwittingly becomes a tool in a complex scheme of revenge by a woman he regards as nothing more than a one night stand."

If the reveal of the 'revenge' plot doesn't come until page 97 I don't think there is a point in including it in your logline... that is of course if the hitman is the main protagonist (?)

Also -- while the fact that he receives his hits via text message is the way that the 'mistaken' hit can logically occur, it's a detail that can be left to the script and is not vital to expressing the spine of your story.

What about:

'A meticulous professional hitman struggles to uncover who set him up when he inadvertently kills his powerful underworld employer.

I also think you could have a play with working a logline with 'X' as the protag...

Anyway -- Good Luck with this.