diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright Ben Clifford (c) 2016
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Author name here nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
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+ACME Smuggler
+=============
+
+The () type has only one value, also called () with no
+internal structure.
+
+Nevertheless, acme-smuggler allows you to smuggle
+arbitrary values into () and discover them later:
+
+```haskell
+> x = smuggle "hello"
+> :t x
+x :: ()
+
+> y = smuggle (7 :: Integer)
+> :t y
+y :: ()
+
+> discover x :: Maybe String
+Just "hello"
+> discover y :: Maybe Integer
+Just 7
+> discover x :: Maybe Integer
+Nothing
+```
+
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/acme-smuggler.cabal b/acme-smuggler.cabal
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--- /dev/null
+++ b/acme-smuggler.cabal
@@ -0,0 +1,35 @@
+name:                acme-smuggler
+version:             0.1.0.1
+synopsis:            Smuggle arbitrary values in ()
+description:         Please see README.md
+homepage:            https://github.com/benclifford/acme-smuggler
+license:             BSD3
+license-file:        LICENSE
+author:              Ben Clifford <benc@hawaga.org.uk>
+maintainer:          Ben Clifford <benc@hawaga.org.uk>
+copyright:           2016 Ben Clifford
+category:            ACME
+build-type:          Simple
+extra-source-files:  README.md
+cabal-version:       >=1.10
+
+library
+  hs-source-dirs:      src
+  exposed-modules:     Acme.Smuggler
+  build-depends:       base >= 4.7 && < 5
+  default-language:    Haskell2010
+  ghc-options:         -Wall
+
+test-suite acme-smuggler-test
+  type:                exitcode-stdio-1.0
+  hs-source-dirs:      test
+  main-is:             Spec.hs
+  build-depends:       base
+                     , acme-smuggler
+                     , hspec
+  ghc-options:         -threaded -rtsopts -with-rtsopts=-N
+  default-language:    Haskell2010
+
+source-repository head
+  type:     git
+  location: https://github.com/benclifford/acme-smuggler
diff --git a/src/Acme/Smuggler.hs b/src/Acme/Smuggler.hs
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--- /dev/null
+++ b/src/Acme/Smuggler.hs
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+module Acme.Smuggler
+    ( inj, prj, smuggle, discover
+    ) where
+
+import Data.Typeable (Typeable)
+import Data.Dynamic (toDyn, fromDynamic)
+import System.IO.Unsafe (unsafePerformIO)
+import Control.Exception (try, throw)
+
+-- | fancy name for smuggle
+inj :: Typeable t => t -> ()
+inj = smuggle
+
+-- | fancy name for discover
+prj :: Typeable t => () -> Maybe t
+prj = discover
+
+smuggle :: Typeable t => t -> ()
+smuggle v = unsafePerformIO $ throw (toDyn v)
+
+discover :: Typeable t => () -> Maybe t
+discover v = either (fromDynamic) (const Nothing)
+  $ unsafePerformIO
+  $ try
+  $ case v of () -> return ()
diff --git a/test/Spec.hs b/test/Spec.hs
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--- /dev/null
+++ b/test/Spec.hs
@@ -0,0 +1,14 @@
+import Acme.Smuggler
+import Test.Hspec
+
+main :: IO ()
+main = hspec $ do
+  describe "prj . inj" $ do
+    it "conveys an integer" $ (prj . inj) (7 :: Integer) `shouldBe` Just (7 :: Integer)
+    it "gives Nothing when going from an integer to a string" $
+      (prj . inj) (7 :: Integer) `shouldBe` (Nothing :: Maybe String)
+
+  describe "prj" $ do
+    it "gives Nothing when projecting from a real ()" $
+      (prj ()) `shouldBe` (Nothing :: Maybe Integer)
+