一首感谢的歌

上一世许婉宁被渣男老公欺骗，自己辛苦抚养的竟然是绿茶小三的孩子，而自己的亲生儿子却早已惨死，这次她重生归来，一手虐渣一手护娃，还与调查红鸩香的裴珩几度交锋，才发现他们的缘分在上一世早就开始了。。A mature, intelligent high school student has a side job arranging "accidental" deaths (no 2 alike) of fellow students' parents. A cop detective notices this student being connected to all the kids of dead parents. Who wins the face-off?。