Like, the one with killing the children? Fantastic concept that went to waste. Why are they killing them? How did this even start? What does living forever have to do with killing kids? Why did the main character change his views? Why was his partner there at the end?
This was all explained either explicitly or implicitly.
1. Everyone takes enhancements that end biological death. Birth would lead to overpopulation. Resources would go to children instead of rich people living luxurious lives.
2. He felt guilty after killing the kids in the beginning and especially what the father said and his death. His girlfriend saying she would want his kids if it was legal made him rethink things too.
3. The partner was following him because he went off on his own investigation. He was almost killed so she was concerned.
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PoW '09 Topic of the Year Co-Winners (Rada and Texy) FFD