Relationships are challenged at Station 19 following Sullivan's actions at Maya and Carina's wedding, putting his marriage with Andy to the test. Dean comes to terms with his feelings for Vic, while Travis rekindles an old flame.

内容描述苏联发生政变时，叛变者控制了一个核子飞弹基地，威胁要攻击美国。美国政府急命阿拉巴马号核子潜艇准备反攻，但就在是否要下达攻击令的关键时刻，潜艇的通讯系统发生故障，无法判断攻击令的真伪。哈克曼饰演的潜艇指挥官决定发射，但新来的副官华盛顿却认为事关重大，应确定讯息再说，不惜为此发动兵变囚禁上司。