Second Life, the online world that drew more than four million users in its first three years, is the setting for this look at relationships that form entirely through avatars. The film follows people who log in to build homes, businesses, and romances with partners they have never met in person, some of them already married in the physical world. Interviews explore what happens when a digital affair, conducted through a screen persona rather than a body, starts to feel as real as anything offline: the guilt, the secrecy, and in some cases the collapse of an actual marriage over an avatar's infidelity. Therapists and users weigh in on whether cybersex and virtual courtship count as cheating, and what it says about intimacy that so many people find it easier to fall in love as a cartoon character than as themselves. The film treats Second Life less as a game than as a genuine second life, one with consequences that follow users back to their first one.