During her bachelorette party trip, Casey, the soon-to-be bride, is bitten by an unidentified insect, which initially seems harmless. Once back home, she begins to have second thoughts about her wedding and attempts to cancel it. However, before she can do so, she starts to develop insect-like characteristics. As she grapples with her physical metamorphosis and pre-wedding jitters, Casey gives in to her newfound instincts, constructing a hive that not only shelters her see-through eggs but also consumes the flesh of others. As her transformation reaches its peak, Casey realizes that a single bite can alter everything.