Exiled from his beloved Venice, Giacomo Casanova flees to Paris at the dawn of the Enlightenment in hopes of putting his reputation as a playboy behind him. But old habits die hard, and temptation is everywhere as Casanova finds a wealth of new opportunity and trouble.

A team of space marines known as the Rapid Response Tactical Squad, led by Sarge, is sent to a science facility on Mars after somebody reports a security breach. There, they learn that the alert came after a test subject, a mass murderer purposefully injected with alien DNA, broke free and began killing people. Dr. Grimm, who is related to team member Reaper, informs them all that the chromosome can mutate humans into monsters -- and is highly infectious.

During a long, hot summer on the Thamesmead Estate in Southeast London, three teenagers edge towards adulthood.