What is most precious to your heart? In this the third instalment of the Love Street Detectives, Anemone and Bluebell team up with some old friends of Spider's to stop a great wrong from happening. They turn to the help of their big sister Rose while trying their very best to maintain the historic shop known and beloved for helping London's magical community with its many trials and tribulations... Of course, as always, their family has their backs, along with the powerful witch Spider – but what is this secret she's been hiding?