Yea so I need help

Umm so there’s this story about I think reincarnation and all that jazz! But it’s BL ! The ML is a the villain of the og story, he is kinda two face and looks kind on the outside ! Oh and he has white hair! The mc reincarnated into I think a traitor or something like that, or was like on the hero’s side ? Idk the only scene I remember from this is the mc I think gets kidnapped or gets send a letter threatening him or giving him a location ! And the kidnappers are threatening him that they are gonna kill his sister, the thing is, the sis in the cage is his real sis from his world! So he was confused, eventually he tricked the kidnappers and I think beat them, not too far away from them, the ml is there listening in and goes to swoop in to save the mc! Plz help me ٩(๑❛ᴗ❛๑)۶