Fan-favorite character Marceline takes on a motorcycle gang of storm clouds but when things take a surprising turn, Marceline finds herself asking Princess Bubblegum for some much needed help and support. Marceline starts feeling restless and comes across a motorcycle gang of storm clouds. Taking this as a chance to try something new, Marceline sets off on the open road with her new friends but things take a turn when she realizes that the storm clouds might be taking things a bit too far when it comes to their pranks. Marceline has to make a choice, to join in and create a natural disaster bigger than Ooo has ever seen or to go back to her boring quiet life--luckily, the answer comes from an unexpected source who just happened to be trailing the clouds...for research, of course. Join Marceline and Princess Bubblegum as they take on a cloud gang, motorcycle racing and science! Written by Jeremy Sorese (Steven Universe, Curveball) and illustrated by Zachary Sterling (Adventure Time), don't miss out on this story of friendship and road racing.