Portia tries to send Lucius to the senate to see what is going on. She wants him to tell her exactly who is talking to Caesar. The soothsayer enters, and Portia questions him; he says he is on his way to the Capitol to warn Caesar. Although he does not definitively know of a plot against Caesar, he is afraid that one exists. After the soothsayer departs, Portia sends Lucius to speak to Brutus to figure out what’s going on.