In a near-future, micro-chipped Los Angeles, a new communications app "Sync" allows individuals to sync minds with one another in order to communicate more efficiently and foster closer connection. A young, anxious woman, Ayla, decides to move in with a new roommate, Devin, who is a childhood friend with whom she lost touch. The women decide to sync their minds for a chance to foster a closer friendship. Ayla begins to notice some very disturbing thoughts and behavior from Devin and as their relationship quickly grows toxic, she starts dreaming about Devin's memories. Ayla realizes she has less than 72 hours to save herself from permanent mental domination before the sync is officially complete.
—Tessa Markle