The TV show Pushing Daisies might fit your bill. The protagonist has to lie about taking/preserving lives often, due to the fact that he has a magical power to wake the dead at the cost of another life. The protagonist magically brings his deceased girlfriend back from the dead, but takes another life in the process, and must lie to hide this secret. Furthermore, the girl must adopt a secret identity and prevent her parental figures from knowing that she has been resurrected.