前妻凯特与儿子尼古拉斯的出现打乱了彼得与新伴侣贝丝的生活。彼得费尽心思照顾深陷抑郁情绪的尼古拉斯，但他还需要兼顾工作和新家庭。重重压力之下，家庭矛盾逐渐激化，诸多过往心结也随之涌现……彼得能否走出困境、获得救赎？

The everyday lives, professional and personal, of the doctors, nurses and patients who find themselves, for various reasons, in the wards of the frenetic cardiac unit of Holby City General Hospital.