In the beginning of the 5th book, someone woke up in a hospital again. This time, it was Leaf. However, she didn't awaken in just any ordinary hospital. It was a tiny undersupplied clinic. A tiny undersupplied clinic that was just a BOGUS COVER FOR LADY FRIDAY SO THAT SHE COULD GET HIGH ON PEOPLE'S ~*HAPPINESS*~ and ~*DREAMS*~! So Leaf decided to do what any ordinary fantasy hero would do: pose as one of the people to be turned into marijuana, walk into Friday's sweet-ass mirror pool, and investigate exactly as to what kind of shit was happening. Along the way, she met two of Friday's disgruntled employees who turned out to be useful later on.
Meanwhile, Arthur had just gotten out of bed. The situation had been getting progressively worse, for the Piper had made all his "children" go super saiyan just to serve him and the remaining Trustees were being dicks as usual and not allowing Dame Primus to fix the uncontrollable Nothing diarrhea that was oh-so-generously spreading out through the House. To add insult to injury, Sneezer had then came in at just the right moment and told him that his mom didn't seem to be on Earth anymore.
"Well, f*ck this," Arthur said to himself, and was transported to a gold pressing facility in Friday's Meth House.
In the facility, Arthur discovered that it wasn't just Friday who was getting high. A bunch of idiots had apparently tried to follow in her suit, and were now reliving the shitty moments of some poor saps' lives. Afterwards, Suzy and some other kid who had become Arthur's friend showed up, this time with a Nithling farmer sent by the Piper to breathe over them really uncomfortably so that they wouldn't escape. Arthur concocted a super complex plan to fight the other Nithlings, which never became that understandable throughout the book.
While all of this was happening, Leaf was helping some guy turn people into Friday's marijuana. Later on, she managed to steal a call from the phone of Friday's Noon, who had turned out to be undeniably hotter than any other Noon previously mentioned in the series.
Anyway, what happened next was predictable enough: Arthur and co. met these cool guys in costumes who led him to the Will, Leaf did something really heroic, Friday's Dawn helped him get to Friday, the Mariner appeared at a very plot-appropriate moment, and Friday herself was told to Just Say No!