S4 finds Harper (Myha'la) and Yasmin (Marisa Abela) at the top of their game, living the lives they set out to have as Pierpoint grads. But when a splashy fintech darling bursts onto the London scene, Yasmin's relationship with Sir Henry Muck (Kit Harington) is thrown into question, while Harper is pulled into the orbit of enigmatic executive Whitney Halberstram (Max Minghella).