"When an attempted assassination and forced medical leave coincide with a request to help find his ex-wife’s missing sister, Zack heads to San Francisco. He soon discovers Chloe is not the only person missing - numerous homeless people have taken part in drug trials and never been seen again. The trail leads to the Athanasia Foundation, a powerful group of scientists and wealthy elites obsessed with cheating death and unconcerned about the collateral damage."