the quest, a swig of hope, is a little complex for players in path of exile. for players, you need to go different three places in order to complete the quest. there are some tips to show how to finish the quest.
step1. accept a swig of hope
to accept a swig of hope, you’d go to the docks and talk with the ship graveyard. you will find him near the waycoin.
step2. find the decanter spiritus
you need to the marketplace and find the decanter spiritus.
step3. find the chitus’ plum
after getting the decanter spiritus, you go to the imperial gardens to find the chitus’ plum.
the imperial gardens can be connected to the ebony barracks, the hedge maze, the library and the sceptre of god. you just go to the hedge maze where there is an oak tree with chitus' plum.
step4. get your reward
you get the decanter spiritus and the chitus’ plum; then talk to ship graveyard in docks. from him, you can take your reward.