Hmm this sounds vaguely like Die Hard with a Diaper or Misadventures in Babysitting . I did lear something on Stack Exchange though about cliches:

Writers often indulge a charming fantasy that publisher and agents are looking for originality. They are not. They are looking for works that fit into a well established sales channel and that habitual readers of a genre can quickly identify as the kind of book they like to read. Pretty much the worst thing you can do in a query letter is indulge in any kind or originality. This is about sales, and sales is all about established and reliable taste.

clich? s are not as bad as they may seem. I used ‘cat and mouse’ and was excoriated for its use but this reviewer I trust pointed out the obvious:
“Cat and mouse game” is an idiom that seems to show up pretty frequently in the description of published thrillers. So that’s a good sign that it works to sell books. Avid readers, the kind that keep publishers and agents in peanut butter and jelly sandwiches, are always looking for another fix of the same drug. They want the same, only different. But not so different that it is no longer the same. Sameness is not a vice, it is a virtue.

So according to him don’t worry too much about using a recognizable idiom as long as it has a proven track record of selling books

http://writers.stackexchange.com/questions/27336/are-idioms-in-query-letters-a-bad-idea/27339?noredirect=1#comment40323_27339