Details' follows a girl, Jackie, who accidentally gives away her best friend's (Jonah) wedding ring to a woman she believes is someone else. She is supposed to be meeting her best friend's other friend (Suzie) who will be the ring bearer at his wedding, and, believing a woman she meets at coffee shop is indeed said friend, she mistakenly gives the ring to this person (Serenity). After relocating the look-alike, then realizing that she retrieved the wrong item and now has no way to locate the mysterious character, Jackie must delve into her mind to find the details about her day that will lead her to the ring.
