Shem is a new compiled-to-JS, statically typed, pure-by-default functional programming language. The semantics are based on Haskell but the language evaluates strictly in a similar way to PureScript. The syntax is S-expressions-based, allowing for a full-blown LISP-like macro system. Shem's prelude includes a full-featured, highly-polymorphic collections library backed by ImmutableJS. The language has been designed for the use within its custom built IDE, Golem available at http://shem.io/, inspired by Bret Victor.