The purpose of this study is to conduct a two-arm effectiveness trial in Cape Town, South Africa of a Xhosa-adapted, nurse-delivered, cognitive behavioral therapy (CBT) treatment for depression and adherence, integrated into the HIV care setting in patients with HIV who did not achieve viral suppression from first-line treatment. The CBT treatment will be compared to enhanced usual care (Enhanced Treatment As Usual - ETAU) on study endpoints (as described in study endpoints section below).