No currently supported version of InDesign contains support for PageMaker files. The last version of InDesign that had such support was the CS6 version of InDesign which is no longer supported by Adobe.
For the record, Adobe has been advising its customers to convert PageMaker files to InDesign format for many years now. Such conversion was not all that simple. One needed to open the PageMaker files in CS6 or earlier versions of InDesign and often do significant manual editing of the resultant InDesign document (many times requiring relinking of placed graphics and adjusts to formatting – InDesign's layout model was not a simple superset of PageMaker's layout model). Some customers headed that advice. Regrettably, others haven't.
Your best bet is to find some InDesign user who has maintained an older system with the CS6 version of InDesign (often specifically to deal with this problem) and see whether they might be willing to do such a conversion for you as a service.
- Dov