A good place to hide a body

For women of Penny's generation, being on hand for elderly parents is just part of life. But for Penny, things have become a little more serious. She rushes over to their house after receiving a frantic phone call one night, with express instructions not to call the police. But they haven't had a fall. They haven't forgotten their computer passwords. They've killed someone. And his body is lying in the garden, right next to the rose bushes. Everyone is capable of murder. They just need to meet the right person.