Kim invites her entire family to Miami to compete in a dragon-boat race. At the same time, Kourtney suspects her sister-in-law is pregnant, while Scott has trouble dealing with Bruce's competitive nature.

When Scott comes back from a Vegas trip, Kim suspects that Scott is up to no good and hires a private detective to follow him. Going against Khloe’s advice, she digs through his phone bill, puts a tracker on his car–and even tails him around town! Meanwhile, Kourtney learns that Khloe’s infertility issues are worse than she thought and wonders if she should offer to be a surrogate.