Jason Grace and the Lightning Thief

We all know what Percy and the Greeks did during the Second Titan War, but what did Jason and the Romans do? What if Ares was not the one who found Luke. What if, in his Roman form, he sent a demigod to do it for him. A certain son of Jupiter, in fact. Takes place the winter before "Percy Jackson and the lightning thief". First in the Jason Grace and the Olympians series.