I give up, I have no idea about the right section where to post such an intricate scenario

...and I watched two times the episode and still I don't understand the plot

from 1:10:00 onwards
https://www.youtube.com/watch?v=fQ0F96z ... Zx&index=1
on a sidenote, the hapless victim killed and robbed of her guide uniform is of course a teen, but hardly I can imagine a more "mainstream" movie, basically this has been filmed as entertainment for families
please inform me about the plot.