When Zack''s friend Spencer brings a 60''s-style hippie book on astral travel to a sleepover, Zack learns the ins and outs of out-of-body travel in a snap. Getting out of their bodies seems awfully easy for the boys. The problem is, how do they get back in?!

When Zack''s friend Spencer brings a 60''s-style hippie book on astral travel to a sleepover, Zack learns the ins and outs of out-of-body travel in a snap. Getting out of their bodies seems awfully easy for the boys. The problem is, how do they get back in?!