A misdelivered letter has Frasier (Kelsey Grammer) and Niles (David Hyde Pierce) obsessing over an exclusive getaway spa. The brothers know the name of the spa but not the location and are determined to find out. This situation culminates in a mad scheme wherein Niles impersonates Frasier's testy neighbor, Cal. Meanwhile, a chance remark by Daphne (Jane Leeves) puts a crimp in Martin's (John Mahoney) leisure activities. Co-star David Hyde Pierce was injured while filming this episode, but you'd never know it.