哥哥温子涵出狱了,一下子拂乱了弟弟子滐和妈妈平静的生活。子涵曾为击剑冠军,数年前因一起赛场杀人案,一夕间从云端坠落低谷。被伤透心的妈妈打定主意和大儿子切割,子滐却坚信哥哥无辜。超市、学校、街巷,子滐不顾妈妈警告,在无数个日夜秘密与哥哥来往,接受哥哥的击剑私教。到底是挚爱的兄长,还是天性本恶的凶手?望着哥哥谜样的眼眸,子滐的内心极限拔河。同时萦绕在他心头的,还有童年时那桩河畔意外的真相。。Gyeong-ah works as a caregiver and lives alone. The only one she can rely on is her daughter, Yeon-su, but it's hard to see her after she moved out on her own. Meanwhile, Yeon-su, who is suffering from her ex-boyfriend, Sang-hyun, argues with him again and visits her mother’s house. After Yeon-su left, Gyeong-ah receives a shocking message from a stranger.。