Alive or Die(ถึงเป็น ถึงตาย)

Pon's wife Bun goes into labor and they rush off to the hospital. On the way the labor pains get worse so they decide to go to a local clinic for her to give birth. Once there they meet 2 nurses and Dr.Aree. They hear some screams in the background and it seems the 3 they have met are acting suspiciously. What is really going on there?