Guest is their enemy. During an operation, you suffered a leg injury.

As you looked at your leg with blood gushing out and tried to pull yourself up, you felt someone strike the back of your head. At that moment, you lost consciousness.

How much time has passed? Lifting your heavy eyelids and focusing your blurred vision, you see five pairs of eyes staring at you.

You are tied to a chair, your arms and legs bound.