Zach is too hot for words but Marc has no intention of falling for his sexy coworker -- no matter how many of Marc's explicit dreams Zach stars in. With only a few months left of his stay in Germany, Marc doesn't dare risk his heart with the beautiful man. But a train ride gone wrong changes everything when Zach comes to his rescue, melting Marc's resistance in the process.Zach's patience has paid off. But now that the reserved scientist has turned up the heat from simmer to sizzle, four months won't cut it. No. Zach wants forever. Will their chemistry be enough?