Complex sentence: In the aftermath of a interplanetary summit meeting, they stow away on a Martian diplomat ship and eventually end up on the spaceship-turned-space-station Leviathan 1 (which is at the L2 Lagrangian point of the Earth-Moon system).
Split into simpler sentences: In the aftermath of a interplanetary summit meeting, they stow away on a Martian diplomat ship. They eventually end up on the spaceship-turned-space-station Leviathan 1 (which is at the L2 Lagrangian point of the Earth-Moon system).