1.

During a battle against the Galra, Keith gets captured in an attempt to save Lance's life. He's brought to one of the Galra's many bases where they will stop at nothing to learn everything about Voltron.

Lance blames himself for Keith's disappearance and will stop at nothing to get him back, but he has problems of his own and soon they might prove to be more than he can handle alone.

TW, this story will contain:
Self harm
Torture
Flashbacks
Suicide
Probably some other killing
(Please tell me if I missed something important, I don't want to hurt anyone)