Heartache forms the core of this psychological thriller about a businessman (Christopher Eccleston) who suffers a heart attack after being driven nearly mad with jealousy, only to get a fresh lease on life when he receives a new heart. But a healthy ticker can't cure all his ills, and soon, his wife (Kate Hardie) is back to her cheating ways, and the mother (Saskia Reeves) of the boy whose heart he received begins turning up on his doorstep.