It stars Billy Crudup, Graham Rogers, Liana Liberato, Stefanie Scott, Melanie Lynskey, Peter Coyote, and Tim Roth.

When a teenager loses his girlfriend in a horrible and devastating accident, he finds that his running keeps him connected to her during his "runner's high" moments in which his heart elates and becomes ecstatic.

Before long, his newfound notoriety attracts the attention of a whip-smart new girl who is determined to find out what's really going on inside him.

[1] Writing for the Los Angeles Times, Katie Walsh praised the film's performances, but felt that its narrative was "cluttered".

[2] Film Journal International's Frank Lovece said it was "shot with great technical control and proficiency", but criticised some of the writing.