On Planet Hera, in the year 4443 A.D., Cheng Jin chooses to end a long-standing relationship with his partner due to their consistent hostility and aloofness toward him. However, shortly after the separation, his ex-lover loses all memory of their shared experiences and falls back in love with him. Although Cheng Jin is pleased, he is also burdened by the certainty that this resurrected romance may not last. These circumstances appear predetermined, almost like fate.