Killer in the Group Chat

504 posts: '10-minute countdown! If the baby's real father doesn't show himself, I'll start killing!' with a photo of a pregnant woman. 303 sends: 'In a bad mood, feel like killing someone.' Xia Nian replied, 'Remember to take a picture,' and he sent a photo of a girl hacked in two—302. Xia Nian is terrified. Group members call it a prank, but 303 replies, 'Feeling much better now.' Xia Nian realizes the pregnant woman from 504 and 302 might be dead. The next countdown might be for her.