Throughout the history of Christianity, lesbian, gay, bisexual and transgender ("LGBT" or"queer") people have been condemned as unrepentant sinners who are in dire need of God's saving grace. As a result of this condemnation, LGBT people have been subjected to great spiritual, emotional and physical abuse and violence. This issue takes on a particular urgency in light of the ongoing harassment and bullying of LGBT young people by their classmates.

Cheng argues that people need to be liberated from the traditional legal model of thinking about sin and grace as a violation of divine and natural laws in which grace is understood as the strength to refrain from violating such laws. Rather Cheng proposes a Christological model based upon the theologies of Irenaeus, Bonaventure and Barth, in which sin and grace are defined in terms of what God has done for us in Jesus Christ.

This book serves as a useful resource for all people who struggle to make sense of the traditional Christian doctrines of sin and grace in the context of the 21st century.