The series will premiere this fall, which insinuates that the sisters -- along with Kourtney's longtime love Scott Disick -- will be residing in the East End through Labor Day weekend. During their stay in the luxurious coastal summer vacation spot, Kourtney and Khloe will open Dash's first pop-up boutique. The pair will also work on relocating Dash's SoHo-based store to a new spot in the city.