Cable's (2010) Q-based theory of pied-piping, and subsequent refinements have invariably focused on wh-interrogatives. This paper fleshes out a Q-based approach to the syntax and semantics of pied-piping in restrictive relative clauses, paving the way towards a unified theory. We develop a compositional semantics for pied-piping in restrictive relatives, by incorporating insights from variable free semantics (Jacobson 1998), and recent applications of scopal mechanisms to the problem of pied-piping in wh-interrogatives (Charlow 2019, Demirok 2019). An empirical payoff of this approach is an account of Heck's (2008) Edge Generalization based on the demands of semantic composition.