First dates are nerve-wracking enough. Going on a first date while an unnamed, unseen troll pings you personal memes that escalate from annoying to homicidal? Blood-chilling.

Director Christopher Landon returns to the thriller genre with the playful, keep-you-guessing intensity he perfected in the Happy Death Day films with this of-the-moment whodunnit where everyone in the vicinity is a suspect . . . or victim. Drop is jointly produced by blockbuster genre houses Blumhouse and Platinum Dunes.

Emmy nominee Meghann Fahy, breakout star of White Lotus and The Perfect Couple, plays Violet, a widowed mother on her first date in years, who arrives at an upscale restaurant where she is relieved that her date, Henry (It Ends with Us’ Brandon Sklenar) is more charming and handsome than she expected. But their chemistry begins to curdle as Violet begins being irritated and then terrorized by a series of anonymous drops to her phone.

She is instructed to tell nobody and follow instructions or the hooded figure she sees on her home security cameras will kill Violet’s young son and babysitting sister. Violet must do exactly as directed or everyone she loves will die. Her unseen tormentor’s final directive? Kill Henry.