Rick wakes up in a dark space surrounded by nothingness after his untimely death due to an incurrable illness.It is there that he meets a spirit that he bargains with so that he may continue his life.The only catch is that he has to live in another world chosen for him by the spirit.Rick, seeing this as the chance of a lifetime(or in this case, afterlifetime), accepts.It is then that he is transported to Republic City from the tv show "The Legend of Korra".