diff --git a/README.md b/README.md
index e6c8bc0..87968df 100644
--- a/README.md
+++ b/README.md
@@ -1,16 +1,32 @@
-### Hi there 👋
+# lnproxy
 
-<!--
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+## What
 
-Here are some ideas to get you started:
+lnproxy is a simple privacy tool that makes invoices more private.
+Users of custodial Lightning wallets get better payment destination privacy
+and sovereign node runners with enhanced receiver privacy.
+lnproxy works like a
+["Poor man's rendez-vous"](https://www.mail-archive.com/lightning-dev@lists.linuxfoundation.org/msg02667.html),
+providing privacy for users without taking custody of their funds.
 
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+## Why
+
+Lightning network invoices reveal the destination of payments.
+
+-	Users who operate public Lightning Network nodes reveal the identity of their node
+	with every Lightning invoice they generate.
+	With lnproxy, these users can obfuscate the destination of their payment from their custodian.
+
+-	Users of custodial Lightning wallets reveal the destination
+	of every Lightning invoice they pay to their custodians.
+	With lnproxy, these users can obfuscate the identity of their Lightning nodes
+	from their transaction counterparties.
+
+## How
+
+Proxy invoices are hodl invoices.
+When an lnproxy relay accepts an htlc for the proxy invoice,
+it immediately pays the original invoice
+and uses the revealed preimage to settle the proxy invoice.
+This ensures that you don't need to trust lnproxy relays
+with your payments.