Paul is in prison, awaiting trial, and not expecting to survive.  He is alone but for Luke, and writes an urgent letter to Timothy, asking him to come before winter, and to bring his manuscripts, and his cloak.  Some of the writing reflects bitterness over the enemies he has made -- he mentions "Alexander the coppersmith", who may be the same Alexander we met in Acts 19 in the riots at Ephesus.  However, he sends personal greetings to a list of friends.