Dennis, a formerly clueless and overweight man, is determined to win back his pregnant ex-fiancée after abandoning her five years prior. As he struggles to reconcile with Libby, who has found a new partner, he decides to focus on finishing something for once in his life: a Nike River-run in London. With the support of his friends Gordon and Mr. Ghoshdashtidar, Dennis begins training for the marathon.

Run Fatboy Run
A former lover, consumed by regret and longing, sets out to redeem himself by preparing for a marathon, hoping to prove his devotion and earn back the forgiveness of his abandoned fiancée.