Die Nacht, in der ganz ehrlich überhaupt niemand Sex hatte

Also known as Alibi

Eric is a successful entrepreneur - in an unusual line of work: he provides people who want to cheat with watertight alibis. When Eric sees his ex-girlfriend from his student days, the vivacious interior designer Andrea, again, sparks fly between the two. But Andrea is horrified by Eric's job, as fidelity is the most important thing for her - she wants nothing more to do with Eric. But he comes up with a trick.