Raised by his brother Song Li, Song Qi’s deep dependence turns into obsessive love. As Song Li seeks a normal life, Song Qi’s possessiveness spirals into madness, pushing their bond into a painful battle between love and control.

年幼时宋立遇到孤儿宋起，将他捡回家当成弟弟抚养长大，却不知在俩人彼此相拥的岁月里，宋起对宋立的情感早已变质，待宋立察觉时，只为让自己得到一个与宋立之间的结果，而宋立则被迫纵容走到了溃不成军的地步......

宋起從小被宋立撿回家，兩人相依為命，宋起對哥哥的依賴逐漸演變為偏執的愛與占有欲，甚至不惜用極端手段保護宋立。然而，當宋立試圖回歸正常生活時，宋起的瘋狂徹底爆發，兄弟關系陷入撕裂與掙紮……