Intrepid private eye Leo Street is on the trail of an adulterous husband when her clapped-out car causes her cover to be blown. It's time to draft in Ciara Gillespie, the teenage tearaway whom she befriended on her last case. At first, Ciara's methods of surveillance leave a lot to be desired, but soon she's unearthing the secret life of an obstetrician who likes to dabble in genetic engineering... With Ciara in control, Leo's free to pursue other matters, such as who's making anonymous phone calls to her friend Maeve, why there's pandemonium at the local creche. Then she accepts an invitation from Andy Raynor - an old flame who she's never fully extinguished - and sparks begin to fly.