From Wiktionary, the free dictionary
Literally, “there is only one step”, or “it is only one step away.”
- IPA(key): /il n‿i a k‿œ̃ pa/ ~ /il n‿i a k‿œ̃ pɑ/
il n’y a qu’un pas
- there's a fine line between... (said of things that are very close to one another, such that one could easily lead to the other)