Four septuagenarian friends who live in a retirement community and, led by a former spy, form the Thursday Murder Club to solve cold cases for fun. But when a shady property developer is found dead, the four find themselves in the middle of their first live case.
In April 2015, the Hatton Garden Safe Deposit Company, an underground safe deposit facility in London's Hatton Garden area, was burgled by 4 elderly men. With the stolen property having a value of up to £200 million, the incident has been called the "largest burglary in English history".
