ONE FOR ALL, ALL FOR ONE! This is the motto of Penny and her friends at the pony club since they are bound by the pact of friendship. But unity must more than ever be strength when Penny is assigned Hercule, a pony nicknamed "the Terror", and when Matt may no longer be able to come to Bois-Guillaume due to his poor academic results… Will tricks and mutual aid be enough to overcome these new obstacles? Together, anything is possible! ​