The Last Signal from Europa

Dr. Sarah Chen, a renowned astrobiologist, receives an encrypted distress signal from the Europa Research Station—a facility she helped design five years ago. The station has been silent for three months, and the signal contains her biometric signature embedded within it. As she races to decode the message, she discovers it's not a cry for help, but a warning: "Don't send anyone. Don't come looking. I'm already dead." The problem? The message was sent yesterday, and Sarah has been on Earth the entire time.