Prometheus no Kase Kusari

Answer the unsolved cases! Why is Prometheus taking on the mysteries of mankind!?

Prometheus was detained in Caucasian Mountains and continues to be tortured for 30,000 years to pay for his unforgivable sin of giving fire to humanity. During the day, the eagle devours his liver. And at night, Zeus punishes him by making him solve humanities cold cases of history— an unbearable predicament for someone who loves the human race.