Pick us up one by one

"They are going to pick us up one by one." Remus had said, after the death of Frank Longbottom. Little did he know that he was going to be the next victem of Voldemort's plans. However, the Order is suspicious that Remus is the spy. How will Remus be saved? Will the marauders save him despite the false accusations? (None of this is mine)