London, 1979. It was just another simple spying mission, so James didn't expect anything to happen. As it escalated he just should have left and returned into safety, when he saw the little brother of his best friend lying in his own blood, facing a certain death. Death Eater or not, he couldn't leave him there, could he? But inviting the enemy into your home in the middle of a war couldn't possibly be a good idea.

Golden boy, Lion boy; Tell me what it's like to conquer. Fearless child, Broken boy; Tell me what it's like to burn. (...) In which a very nosy James Potter notices that every weekend, when everyone falls asleep, Regulus Black sneaks into an abandoned fifth-floor classroom, and he can't help but try to find out what the little Black is up to.