How to Get Post in Directory?

[FahmiRaazali]

Can somebody help me with this. I am trying to get the post in the parent directory only but I failed to find the solution.

I am using the plugin from here: https://gist.github.com/plusjade/7717779 and have try it few times and I still can not get what I want.

folder directory

|--series
....|--dexter
........|--dexter-01.md
........|--dexter02.md
....|--dexter.md
....|--heroes.md

a) How to get only the series? I want to get only "dexter" and "heroes".
b) I try to use the code below to get the episode of dexter but it not working.

{{# series.filter.dexter/}}
{{title}}
{{/ series.filter.dexter/}}

Thank you.