Characters
Regulus Black, Other Relationship Tags to Be Added, Remus Lupin, Sirius Black, James Potter, Severus Snape, Voldemort (Harry Potter), Regulus Black & Sirius Black, Evan Rosier, Lily Evans, Barty Crouch Jr., Walburga Black, Orion Black, Sirius Black & Remus Lupin & Peter Pettigrew & James Potter, Regulus Black & Barty Crouch Jr.
Tags
Time Travel
Albus Dumbledore Bashing
Regulus Black-centric
Regulus Black and Sirius Black Angst
Bad Parent Walburga Black
Regulus Black Needs a Hug
Sirius Black & James Potter Friendship
Manipulative Albus Dumbledore
Protective Sirius Black
Established Sirius Black/Remus Lupin
French Regulus Black
Abusive Walburga Black
Bad Parent Orion Black
Sirius Black as Padfoot
BAMF Regulus Black
Warning: Orion Black
Walburga Black Bashing
Summary
Regulus knew he would die when he entered the cave, but that was okay. He decided to send one last letter to his brother. To relay everything that he knew because he wanted to make sure at least one other person knew what was going on. One other person, his brother. Sirius. He had not spoken in years, and Sirius had long since replaced him, before he ran off in the middle of the night. James was his brother now, but Regulus had nobody else he could trust. So, he would trust Sirius and give him everything...just in case.This last-minute change of his plans, or rather alteration, changed his fate for better, or for worse, as Sirius promptly goes on a crazed rampage to save him. Can Sirius save someone he doesn't know if he hates or not? And what is happening with Voldermort's army now? Perhaps Regulus knew much more than he let on, but Sirius would have to convince him not to go on suicidal missions before he could begin to ask about those.