他和她，两名巡逻警察正在街上值班。一切如常，似乎没有不祥之兆，但就是这次值班让她发现他出轨了。这个发现却是致命的，因为她的手上拿着一把手枪。

Two street patrol officers, he and she, are doing their shift. It seems like nothing bad is going to happen, but this shift is the one when she finds out he has cheated on her. This discovery becomes fatal since it's a firearm in her hands.