Yes, it's simply an OBJ imported into the effect. The rest is just finding suitable settings for the line renderer and using multiple instances of it.
you need first to have an obj object, which you can download from the web or create one using Cinema4D for example. An obj is a 3d object (in your case the deer).
Then, import that obj file into after effect and place it in your composition.
Now in the drop down menu you can select your obj.
Are you still facing this problem with this issue with Plexus? If not, let us know how you solved it. If so, please let us know so we can assist you further.