Jessica Fletcher travels to Ireland, where she attends the reading of an old acquaintance's will. The will contains the clues to finding a secret treasure, one that will require an already strained family to work together in order to solve the mystery.

Jessica Fletcher leaves her Cabot Cove residence to attend a big-city writer's conference. As generally happens wherever Jessica shows up, a murder takes place; in this instance, the victim is a former KGB agent who was about to publish his tell-all memoirs. Teaming up with fellow author Warren Pierce, Jessica sets about to solve the murder -- much to the dismay of the local constabulary.

Jessica is on a train headed for El Paso where she is to lecture at a conference. She shares a table in the dining car with a woman who subsequently vanishes, leaving her purse on the table. Then a message is announced for the woman and Jessica accepts it. This leads to an attack in her compartment and a demand for 'it'. She has no idea what 'it' is and is rescued by a man claiming to be a journalist. The plot thickens. She is warned away by an FBI man, but continues to follow her clues to Agua Verde where the woman apparently lives. The plot twists and turns as she delves deeper in a most devious mystery.....

当心理医生建议新寡的爱蜜丽（Angela Lansbury）追求自己的梦想，以免沈浸在丧夫之痛中时，万万没想到她竟会到中央情报局求职，原来爱蜜丽一直梦想当个间谍；在经过短暂面试后，爱蜜丽却因一个阴错阳差的误会，接下前往摩洛哥取回一本密码簿的「简单」任务。 当中情局发现错误后，立刻派出超级情报员（Thomas Ian Griffith）协助爱蜜丽完成任务，不料后来两人却身陷囹圄，而这位正牌情报员还受了伤，此时只有靠爱蜜丽的机智才能让两人脱逃，好完成此行的任务；随著情势越来越紧张，这位速成探员也逐渐发现这件「简单」任务，其实一点也不简单…

The third TV-Movie in the highly successful "Murder, She Wrote" involved Jessica Fletcher Jessica discovers a shocking old family secret that leads her on a journey to the deep South to bring to light the mysterious details surrounding the death of a slave owned by one of her long dead ancestors in the mid-1800s.