There's a chain,it ties a little bird which wants to fly away, the chain is heavy,it hurts the bird so much. The bird wants to break away,wants to b free from the chain that hold it for so long makes it in pain all the time. However,the bird also wants to use that chain to take revenge the person who holds it like a prisoner, because it knows that as long as the owner still keeps it,the bird can harm its owner severely. It's a betrayal bird after all, but how can it not be a traitor when the owner hurt the bird so much. The bird used to thought that it was loved,and the owner was its family. It realized that the owner just do their duty,and don't want their reputation to be damaged. The bird sick of its own life,but the desire to take revenge even stronger than its wish to be free...