It’s Easter 1967, and celebrations are underway for a colourful Easter bonnet parade outside Nonnatus House.　　Sister Monica Joan and Reggie are excited about the Eurovision song contest, while Cyril and Lucille settle into blissful married life. After taking some time away following the death of their newborn son, Derek and Audrey Fleming return to Poplar with good news - Audrey is pregnant again.　　During demolition work at a nearby tenement block, the builders make a shocking discovery. The news ripples through the community, and the police are called in. The trail leads to someone close to home and has a heartbreaking effect on the team.

1967年复活节，诺纳图斯家外正举行着色彩缤纷的复活节帽子游行，庆祝活动如火如荼地进行着。莫妮卡·琼修女和雷吉对欧洲歌唱大赛兴奋不已，而西里尔和露西尔则沉浸在幸福的婚姻生活中。德里克和奥黛丽·弗莱明在刚出生的儿子去世后离开了一段时间，带着好消息回到了波普勒——奥黛丽又怀孕了。在附近一栋公寓楼的拆除工作中，建筑工人发现了一个惊人的秘密。这个消息传遍了整个社区，警方也因此被叫来。线索指向了一位住在附近的人，并给整个团队带来了令人心碎的打击。