With T'Pol and Trip hostage, Paxton demands that all aliens leave the solar system or else he will destroy Starfleet HQ. With that warning and the clock counting, Starfleet orders Archer and the Enterprise to Mars to take out the weapon threatening Earth. Meanwhile the cloned baby of T'Pol and Trip is getting sicker and time is running out for her as well. With the clock ticking, the future of the planned Federation lies in the balance.