diff --git a/mmv.go b/mmv.go
index 84e0e4b..72c995a 100644
--- a/mmv.go
+++ b/mmv.go
@@ -1 +1,13 @@
 package mmv
+
+import "os"
+
+// Move multiple files.
+func Move(files map[string]string) error {
+	for k, v := range files {
+		if err := os.Rename(k, v); err != nil {
+			return err
+		}
+	}
+	return nil
+}