In the scene where the heroine of "Phantom Chase" rejects her ex-boyfriend's proposal, she sees the text message on her ex-boyfriend's phone. How does she know that the murderer is nearby?

Bryce’s mobile phone shows that Anna sent a text message calling Bryce to come to this hotel to meet, and Anna received the message that Bryce called her to come. It can be seen that the messages between the two were sent by the murderer. Yes, the murderer asked these two people to come to the hotel he designated at the same time, so the murderer must have come too.

Some subtitles are not translated well.