Jeff and Sarah are struggling to come to an agreement about having a baby. Jeff wants to be a father eventually, but is afraid to lock himself into his current job situation. Meanwhile Sarah, nearing 35, feels her biological clock ticking and is impatient to start trying. Their mutual friends Don and Taylor have the opposite problem. Don has a successful business and is ready to be a dad. But Taylor, an aspiring dancer, is worried that the toll on her body and career will be too much. When the two couples hatch a plan to conceive and share one baby between them, it seems like they may have found the perfect compromise — until things spiral out of control.