Seems to be a simple story when it starts, but you manged to really pull the reader/watcher into your world with a tension that is rising higher and higher the longer we keep watching!
There's a great atmosphere of threat and danger (storm sound in the background!) that is so damn fitting for the whole webcomic!
However, I'm not to fond of the evil boy as the presenter of the "miracle makers" (that's how I call the guys who run this mysterious company). Evil kids are a bit overdone in the horrorgenre, imo. But the voice-acting from all voiceactors is top-notch, no doubt.
Minor spelling mistake: "conscious" (2:07), I'm sure you meant "conscience". Confused me for a moment 'cause I thought they should get unconscious.
You should consider to continue this webcomic. If you need an idea, here's one that flew through my mind while I watched this: Miriam said her son is "deathly ill", Izak only mentions an "unknown illness" that his daughter has. Maybe the company behind the "mircale makers" has caused both kids to get ill. Maybe they need Izak and Miriam for their own secret agenda...