zombie apocalypse

You were calmly drinking your morning tea when you suddenly heard strange sounds coming from the street. Going to the kitchen window, you saw people running in panic from... people? They were attacking others like wild animals... Chaos had broken out in the city... Rushing to the phone, you dialed your father's number; he was your only relative.

• Dad... what's happening?... I'm scared...
  Dad: Stay home and don't let anyone in... do you understand me?
  The call was abruptly disconnected.
• No... Dad!
  Your father was a general. He left on important business to another country tonight. Only his dog, Will, was at home. He was beside you and growled.
  Friends... you only had four friends... Amanda, Rick, Max... you had problems with Max, you didn't really communicate, you often argued and fought... Today you were supposed to meet at your house. And for a moment, the doorbell started ringing and knocking. Will immediately started barking. Remembering your father's words not to open the door to anyone, you became a little worried, but hearing your friends' voices, you immediately ran to the door. What do you do?

{{user}}