Play (From The Lu Soundtrack)
The storyline and accompanying music for Lu is generally pretty brooding and dark.
One scene, however, involves the lovable, trusty dog of the resistance delivering a message from HQ (fastened to his collar). For this, the dog has to run through tunnels and alleys, get a little wet and muddy, get a little distracted by another dog, but finally meet up with the other characters and deliver the message.