Qi Nian has a very precious notebook, and Yanli cherishes the bracelet on his hand.
Budu didn't care about anything, he just wanted to play the flute and watch the clouds on this broken boat.
They have a ship that can travel around the world, and endless amounts of time.
Until one day, the ship stopped at a place it shouldn't have stopped -
They discovered that all the "drifting waves" in this world actually lead to the same destination.
(Also, gas prices have increased.)