By Firelight by Rebecca Ripple

Barely sixteen years old and fearing for his mother's life, Draco stepped up in his father's absence to take his place amongst the Death Eaters. The following year at Hogwarts School was, without a doubt, the hardest he had ever endured. Now seventeen, the young Malfoy seeks to keep safe all he loves by doing the opposite, and taking the golden advice Albus Dumbledore had left him minutes before his death.